Motherhood does interesting things to people. Lying there in the delivery room holding the most precious thing in the world, everything that used to feel "so major" becomes so, so minor.

Fashion trends– who in their right mind is prioritizing ripped denim over bleached and why on earth would we care? Cars– literally all we care about is if there's gas in the tank (and four wheels that take us from A to B, please). Becoming a mom is the most powerful, most life-changing moment a woman will ever go through, and even Hollywood's biggest party animals aren't immune.

The Hollywood wild child is something we've seen over and over. What gets us every time though, is the 24/7 club girl who goes from stumbling out of bars at 3 a.m. to fuzzy cuddle mom. Suddenly, she wants her baby food organic (and her nights early). With notorious party girls like Kim Kardashian and Angelina Jolie doing the world's biggest 180s we've ever seen, it's time to take a closer look at just how much celeb moms change. The designer-shopping, bar-hopping, partiers  are now carrying their broods to preschool in leggings. Girls who only ever made headlines for clingy dresses are wearing the biggest "mom" wardrobes ever. Here are 20 celebs who had a baby, woke up to what matters, and did a total 180 in the process.

20 KYLIE JENNER: "YOU MAKE ALL MY MORNINGS"

Pulling off a secret pregnancy when you're the most photographed face in Hollywood is one thing. Pulling off being a mom when the whole world has already judged you? Kylie Jenner, you still blow us away. From Little Miss Luxury with a Lamborghini accessorizing her Ferrari to this, Kylie might have kept up the Louis Vuitton, but she went weak at the knees with her baby.

"I'm learning so much more about myself and life," Kylie said. Kylie even misses being pregnant. "I liked it. I miss it." The Instagram captions of her with Stormi? "You make all my mornings."

19 ANGELINA JOLIE: "THEY MAKE EVERYTHING BETTER"

Once upon a time, Angelina Jolie was the Hollywood rebel child. She rocked up to red carpet events in skintight leather. After adopting Pax, Maddox, and Zahara, then having three kids with Brad Pitt, "fear me Ange" became the softest humanitarian we've ever seen.

"The center of my life is my kids. They make everything better in my life."

Despite being an A-list actress, Angelina sees herself "as a mom first." Ange has openly said that she feels "so lucky to have that role in life. I wake up with my kids and I'm happy."

18 KIM K: "THEY ARE THE #1 PRIORITY"

Before having kids, Kim Kardashian was a Rodeo Drive regular who partied until dawn with Paris Hilton. People still judge Kim unfairly– people either say she's vain or she's obsessed with money. With three kids of her own, Kim's biggest priority is now her family.

"I usually wake up really early, around six o'clock. I like to check on [North] as soon as I wake up." That was from Kim's Harper's Bazaar interview, back when North West was the only kid. Kim might be running a beauty empire, but just watch Keeping Up With The Kardashians. North, Saint, and Chicago are in Kim's arms, playing with mom, and 100% her life.

17 HILARY DUFF: STRETCH MARKS ARE SOMETHING TO BE PROUD OF

Now expecting baby number two, Hilary Duff is used to the mom life. That wasn't always the case, though. Hollywood parties and a 2000s squad that mostly went to bed with the sunrise were this mom's old life. Hilary is one of those moms who says it like it is. "Pregnancy is hard." As to her divorce, Hilary was honest: "It sucks," Elle reported.

When it comes to Hilary's motherhood, though, we can see the 180. "You just don't even know until you have that child what that bond does, how it changes you, and what you learn." Shutting down body shamers, Hilary has called stretch marks "battle wounds."

16 CARDI B: "I RESPECT MOTHERS MORE THAN EVER"

Here's an interesting change from hip-hop's toughest talker. Cardi B's social media used to be a steady string of eye-popping outfits, Versace name-dropping, and whichever rapper she was currently having "beef" with. That all changed in 2018 when Cardi had baby Kulture.

"I can't leave my baby for a second. I can't believe I have a boss. I really have a boss."

Cardi's Instagram stories are now whispered (Kulture is a handful when she wakes up). "I respect mothers more than ever now," Cardi said. "I see moms differently now." Cardi even pulled out of Bruno Mars' 24k Magic tour to be with Kulture.

15 BLAKE LIVELY: WANTS "30 KIDS!"

Fans might be questioning whether baby #3 is on the way for Blake Lively, but this actress changed the minute #1 was born. With a super-real attitude to getting that post-baby body back– "You don't need to be Victoria's Secret ready right away," Blake is a woman who doesn't hide her feelings.

"I've always wanted a big family," she told Allure in 2012. "Oh, I'd love 30 [children] if I could." Playing a spoiled, manipulative New Yorker in Gossip Girl, Blake's pre-baby life had no room for spaghetti flinging or diapers. Blake actually wants more. "If I could spit out a litter of kids, I would."

14 KOURTNEY KARDASHIAN: DOESN'T LIKE WHEN SHE'S AWAY FROM THEM

Three of her sisters might now be moms, but Kourtney Kardashian was the original deal. That said, before Kourt had her first kid with Scott Disick, she was just as much of a party animal as Kim. Kourtney & Kim Take Miami was just one of the shows that saw these two live it up every night.

"I can't be away from them without feeling guilty. My friends keep saying: You and your boyfriend should go out and eat."

Kourtney has made major headlines for her parenting. Her gluten-free, dairy-free, and organic foods are just as controversial as her co-sleeping, but this is a mom who cares.

13 BEYONCE: THE HEARTBEAT WAS "THE MOST BEAUTIFUL MUSIC EVER"

Those words turn so much more meaningful when you learn that Beyonce was talking about losing her baby– Beyonce went onto have Blue Ivy, plus the twins, Rumi and Sir. "I was pregnant for the first time," Beyonce said on an HBO documentary. "I heard the heartbeat, which was the most beautiful music I ever heard in my life."

Beyonce might not have been a party animal before becoming a mom, but she was a music animal. Nothing else seemed to matter to her. Nothing else was filling her life. "My daughter introduced me to myself." Beyonce called pregnancy "the most beautiful experience of my life."

12 BRITNEY SPEARS: "YOU ARE MY MASTERPIECES"

In 2016, Britney Spears wrote a letter to her sons, Sean Preston, and Jayden James. This mom of two has gone from unpredictable and sometimes unstable to one of the most grounded moms around. Britney has been messed around by guys. She hasn't always known where to turn.

"You are my masterpieces," Britney wrote. "From the day I saw the most precious eyes, I believed in miracles to the core. I pray as a mother I teach you strength and passion."

Britney added that "exploring" the beautiful world of her kids is the greatest gift that she has been given.

11 CHRISTINA AGUILERA: "THE LITTLE THINGS ARE SO AMAZING"

With songs like "Lady Marmalade" and the iconic "Dirrty" video, Christina Aguilera's early days weren't spent projecting the most wholesome image. Now that Christina fronts Paper magazine with zero makeup and a ring that says "mom," we're seeing huge changes. In 2008, Christina had baby Max, followed by Summer Rain.

"Having children is the ultimate joy," Christina said. "It's the little things that are so amazing as a mom." Christina has admitted that music was something that she used to "escape" into. Now it's a gift that she wants to pass on. The party girl is gone.

10 NICOLE RICHIE: "MOTHERHOOD IS BEYOND AMAZING"

With Paris Hilton for a sidekick, the 2000s were one giant shopping and party spree for Nicole Richie. The Simple Life star spent her days showing off her spoiled life and designer purses, but giving them up for strollers wasn't a problem for Nicole. Harlow was born in 2008 and Sparrow was born in 2009.

"Kids are so precious that your priorities change completely," Nicole told People. Nicole has said that she "owes her life" to baby Harlow. Super toned-down with daytime activities, ice cream, and grocery trips, this is one mom whose actions reflect her words: "Motherhood is beyond amazing."

9 VICTORIA BECKHAM: "MOTHERHOOD IS MY GREATEST ACHIEVEMENT"

Strong words from a woman who has built a $450 million fashion empire. Victoria Beckham was literally a different person before becoming a mom to Romeo, Cruz, Brooklyn, and Harper. The former Spice Girl was 100% about the fake tan, bodycon dresses, and late-night parties.

"Being a mother is simply the greatest achievement of my life. It has taken me on an unexpected journey..."

"The emotional connection I feel towards my children brings boundless elation and joy." Victoria's biggest worries used to be tan lines. Now Victoria admits to Vogue that the "inevitable worry and concern" is part of motherhood. With 4 kids, Victoria is all kinds of goals.

8 SNOOKI: "GYM, TAN, LAUNDRY BECAME GIGGLES, TOYS, LOVE"

Jersey Shore: Family Vacation has brought this cast back, but the clue is in the word: "Family." With over 11 million Instagram followers, Nicole "Snooki" Polizzi is now more famous as a mom than she ever was on Jersey Shore. Snooki is now a mom to Lorenzo and Giovanna, and these two cuties have completely changed their mom.

"GTL" on Jersey Shore stood for "Gym, tan, laundry." In an interview with Parents, Snooki revealed the new meaning. It's "giggles, toys, love." Snooki described motherhood as "phenomenal. I feel like I have a new best friend." Snooki even told E! News that she "wants two more."

7 JLO: "I'D LOVE TO HAVE TWINS AGAIN"

Before Jennifer Lopez was in the mommy business, she only had show business. Don't get us wrong– a career that spans nearly 30 years is something to be proud of, but for J-Lo, her greatest pride are her kids. Jenny from the block is now a mom to Max and Emme.

"Kids make you believe in all kinds of things, like how anything is possible," Jen told People. "I don't know if it's on the cards for me," she said at 45, "but I would love to have twins again, to be blessed one more time." At 49, Jen still could, but she seems happy as she is.

6 KENDRA WILKINSON: "HAPPY" ABOUT STRETCH MARKS

Never in a million years would we have predicted Kendra Wilkinson to become that "mom in shorts" whose Instagram has pics of the kids on their bikes. The former model and Girls Next Door reality star was 100% pool parties and swimsuits until she met Hank Baskett and started a family.

Kendra celebrated Mother's Day by posting pics of her stretch marks. "Look what my 2 babies did... They make me happy." Kendra On Top now follows a grounded mom with routines and responsibilities. "I want to raise my kid different from me," Kendra said after Hank Jr. was born. Now Hank has a sister, Alijah.

5 KHLOE KARDASHIAN: "YOU ARE MY SUNSHINE"

Khloe Kardashian was halfway there when it came to major life changes. The Keeping Up With The Kardashians star has been channeling her energy into fitness for the last few years– and it shows. Khloe has said: "I always wanted kids." When Khloe found out that she was pregnant in 2017, she was in for a whirlwind of baby daddy drama, but baby True has changed Khloe.

"Of course it's an adjustment but it's so beautiful!" Khloe replied to a fan asking about the star's newfound motherhood. With a series of adorable pics of Khloe and True getting their "momma and baby" on, we're so rooting for this new mom.

4 MADONNA: MOTHERHOOD GAVE HER SOME MUCH NEEDED PERSPECTIVE

If you think that Gwen Stefani or Lady Gaga are the original rebel child, think again. Madonna spent the 80s and 90s surprising the world with her futuristic attitudes and risky outfits, but at the age of 60, a lot has changed for the "queen of pop." Madonna has six kids– Lourdes Leon and Rocco are biological, while David, Mercy, Esther, and Stella are adopted from Malawi.

"I was so selfish. Motherhood has mellowed me."

In an interview with The Daily Mail, Madonna added: "I get to be the mom I never had. So yeah, it's a very healing experience."

3 MILA KUNIS: PREVIOUS ISSUES "NO LONGER MATTERED"

Mila Kunis was never a Kardashian-style party girl. A hard work ethic has been with this actress ever since her family moved to the US with just $250 to their name when Mila was a child. Mila and Ashton Kutcher are one of Hollywood's most down-to-earth families. Often mocked for "raising their kids poor," Mila wants to instil real values in her children.

Mila changed hugely after having Wyatt and Dimitri. "I had better things to concern myself with than some stranger's opinion," Mia told Variety. "When I became a mom, so many things that I used to be insecure about and concerned myself with, no longer mattered."

2 HEIDI MONTAG: "GOD BLESSED US WITH AN ANGEL"

Looking through Heidi Pratt (formerly Montag)'s Instagram, you could be forgiven for having gotten the wrong profile. The Hills star spent the 2000s in a very "Paris Hilton-style" rollercoaster of designer shopping and club line-ups.

"This is a very emotional day. The day our lives changed and we became a family of 3. After 11 years of just being the 2 of us, God blesses us with an angel. Life will never be the same. My priorities and perspective have completely shifted. I will do everything to protect and love our family. Life is short and family is my #1." The caption says it all.

1 ASHLEE SIMPSON: "YOUR PRIORITIES IN LIFE SHIFT"

Jessica Simpson is currently making headlines for announcing her third pregnancy. Always watch out for the younger sister. Ashlee Simpson came with an edgier look, an edgier sound, and a whole ton of partying. That is, until Ashlee settled down with Pete Wentz to have Bronx Mowgli and Jagger.

"Your priorities become your children," Ashlee told Today. "It's a change for the better. Life is so good with kids." Everything from watching Jagger crawl around to noticing those "specks of dirt on the floor" is part of the journey for Ashley.

Hit share on Facebook for anyone who needs a reminder of what the journey of motherhood can do. These 20 celebs changed overnight. Let's get it viral.