01of 11
WHEN MANDY MOORE AND ANNE HATHAWAY GUSHED OVER A PRINCESS DIARIES #TBT
SGranitz/WireImage

While the actresses' characters were far from friendly inThe Princess Diaries,their recent Instagram banterproves there’s nothing but admiration between the stars IRL. Moore posted the throwback pic of the movie’s 2001 premiere to Instagram, writing, “I guess this film came out just over 17 years ago?? 🙀 @annehathaway was already a movie star and I showed up to my first premiere in a casual denim suit. Hey, it was 2001! #tbt #theprincessdiaries.”
02of 11
WHEN ADELE & CÉLINE DION SHARED NOTHING BUT LOVE FOR EACH OTHER
VALERIE MACONVALERIE MACON/AFP/Getty

The music powerhouses came together when Adele joined Dion backstage following the Canadian singer’s Las Vegas show in January 2018 - and the pair’s encounter was certainly memorable. Dion took to Instagram to give the Brit a sweet shout-out that same month. “I had a pretty rough time during the last couple of weeks,” she wrote. “… A lot of people have been hit with cold and flu bugs … but I’m doing much better now. Wasn’t able to do all my shows, but was thrilled that Adele came to one of them … I love her so much!!”
03of 11
WHEN JESSICA CHASTAIN PROCLAIMED HER LOVE FOR KIM KARDASHIAN WEST’S CONTOURING TUTORIALS

Inan interview withWMagazine, Chastain revealed how she transformed into Molly Brown for her performance inMolly’s Game -and how Kardashian West’s contouring tutorials were a huge help.“For research, I actually watched Kim’s tutorial on face shading and contouring. As the movie goes on, Molly transforms into this idea of what a woman has to be in order to be heard: The heels get higher, the necklines are lower, the hair is longer. It was quite a departure for me, physically,” Chastain told the magazine. The critically acclaimed singer also referred to the Kardashians as “an incredible example of women who have their own sense of entrepreneurial power.'”
04of 11WHEN KELLY CLARKSON PROPOSED A DUET WITH SAM SMITHThe pop powerhouses took to Twitter to share their mutual admiration for one another, and it was adorable. “I met @samsmithworld & his entire crew of Sam’s (and a Jack) today,” Clarkson tweeted, calling the “Stay with Me” singer a “super sweet guy! Already loved his music, now I’m a fan of his person.” Smith was quick to return the love, replying: “You are truly wonderful in every way Ms Clarkson. All my love forever and always. Hope to see you soon!!!!!“Clarkson continued to gush about the British Grammy winner, even proposing a duet next time they’re together, responding: “We should probably sing together at some point if we’re ever in the same neighborhood again. Just sayin',” then adding: “love your new song!”
04of 11
WHEN KELLY CLARKSON PROPOSED A DUET WITH SAM SMITH
The pop powerhouses took to Twitter to share their mutual admiration for one another, and it was adorable. “I met @samsmithworld & his entire crew of Sam’s (and a Jack) today,” Clarkson tweeted, calling the “Stay with Me” singer a “super sweet guy! Already loved his music, now I’m a fan of his person.” Smith was quick to return the love, replying: “You are truly wonderful in every way Ms Clarkson. All my love forever and always. Hope to see you soon!!!!!”
Clarkson continued to gush about the British Grammy winner, even proposing a duet next time they’re together, responding: “We should probably sing together at some point if we’re ever in the same neighborhood again. Just sayin',” then adding: “love your new song!”
05of 11
WHEN JOHN MAYER WAS LEFT SPEECHLESS AFTER NICKI MINAJ TWEETED HIM

06of 11WHEN LENA DUNHAM SENT TAYLOR SWIFT AN ADORING TWITTER DMAfter watching a 2012 episode ofGirls, Swift went on Twitter to follow the show’s creator. While scrolling through Dunham’s feed, she saw Dunham had recently tweeted a sweet message about the singer. “Within five minutes I had a direct message from her,” the Grammy winnertoldRolling Stonein 2014. “She said, ‘I am so excited about the prospect of being friends with you that I added the adjective best in front of it. The idea that you like my show is so thrilling, and I can’t wait to lavish you with praise in person.’ " And thus began the start of the pair’s friendship.
06of 11
WHEN LENA DUNHAM SENT TAYLOR SWIFT AN ADORING TWITTER DM
After watching a 2012 episode ofGirls, Swift went on Twitter to follow the show’s creator. While scrolling through Dunham’s feed, she saw Dunham had recently tweeted a sweet message about the singer. “Within five minutes I had a direct message from her,” the Grammy winnertoldRolling Stonein 2014. “She said, ‘I am so excited about the prospect of being friends with you that I added the adjective best in front of it. The idea that you like my show is so thrilling, and I can’t wait to lavish you with praise in person.’ " And thus began the start of the pair’s friendship.
07of 11WHEN ZAC EFRON WAS IN AWE OF SIMONE BILES' OLYMPIC SKILLSSimone Biles/TwitterThe two first started interacting online when Efrontweeted Biles right before the 2016 Olympics:“Good luck at the Olympic trials @Simone_Biles! #Rio2016.“As for Biles' response?The Olympic gymnast appropriately tweeted back: “OH MY GOSH I THINK I AM GOING TO PASS OUT OH MY GOSH CRYING! THANK YOU.“Their social media banter continued one month later when Efron wrote: “So phenomenal a skill’s named after her. Congrats on sticking the Biles and qualifying for the finals @Simone_Biles!“The pair eventually met in person, with Efron even planting a kiss on Biles' cheek.
07of 11
WHEN ZAC EFRON WAS IN AWE OF SIMONE BILES' OLYMPIC SKILLS
Simone Biles/Twitter

The two first started interacting online when Efrontweeted Biles right before the 2016 Olympics:“Good luck at the Olympic trials @Simone_Biles! #Rio2016.“As for Biles' response?The Olympic gymnast appropriately tweeted back: “OH MY GOSH I THINK I AM GOING TO PASS OUT OH MY GOSH CRYING! THANK YOU.”
Their social media banter continued one month later when Efron wrote: “So phenomenal a skill’s named after her. Congrats on sticking the Biles and qualifying for the finals @Simone_Biles!”
The pair eventually met in person, with Efron even planting a kiss on Biles' cheek.
08of 11
WHEN CHRISSY TEIGEN TWEETED HER LOVE FOR MINDY KALING AND THE MINDY PROJECT
Chelsea Lauren/WWD/REX/Shutterstock; Jen Lowery/SilverHub/REX/Shutterstock

09of 11
WHEN DOLLY PARTON COMPLIMENTED KELLY CLARKSON’S ‘JOLENE’ COVER
Jason LaVeris/FilmMagic; Brad Barket/Getty Images

And just like anyone else, Clarkson was left in awe following Parton’s compliment, expressing her gratitude in a follow-up tweet: “Remember that one time Dolly freakin' Parton tweeted me?”
10of 11WHEN SIA & KATY PERRY TWEETED EACH OTHER LOVE NOTESJohn Shearer/Getty Images for Kitty Purry, Inc.They’ve gushed about one another before, but nothing beats the short and sweet love notes theytweeted in February 2017. “Dear @katyperry love you cookie,” wrote Sia, which was met with a response from Perry an hour later: “Dear @Sia love you too muffin.”
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WHEN SIA & KATY PERRY TWEETED EACH OTHER LOVE NOTES
John Shearer/Getty Images for Kitty Purry, Inc.

They’ve gushed about one another before, but nothing beats the short and sweet love notes theytweeted in February 2017. “Dear @katyperry love you cookie,” wrote Sia, which was met with a response from Perry an hour later: “Dear @Sia love you too muffin.”
11of 11WHEN PATRICK STEWART & IAN MCKELLEN ASKED TAYLOR SWIFT IF THEY COULD JOIN HER SQUADBryan Steffy/Getty Images for iHeartMedia; Mike Marsland/WireImageTheX-Mencostars gave a dramatic reading of T-Swift lyrics for NPR’sAsk Me Another. Stewart then tweeted the link at the singer, along with a polite request to join the squad. “So @IanMcKellen recited Bad Blood and I did Blank Space on @NPRAskMeAnother. May we join the squad, @taylorswift13?” hewrote.Swift had a total fan girl moment and thanked the actors profusely. “Thanks for reciting my lyrics, @IanMcKellen and @SirPatStew! You’ve made my day,” shewrote. She added: “You two are ULTIMATE Squad Goals.”
11of 11
WHEN PATRICK STEWART & IAN MCKELLEN ASKED TAYLOR SWIFT IF THEY COULD JOIN HER SQUAD
Bryan Steffy/Getty Images for iHeartMedia; Mike Marsland/WireImage

TheX-Mencostars gave a dramatic reading of T-Swift lyrics for NPR’sAsk Me Another. Stewart then tweeted the link at the singer, along with a polite request to join the squad. “So @IanMcKellen recited Bad Blood and I did Blank Space on @NPRAskMeAnother. May we join the squad, @taylorswift13?” hewrote.
Swift had a total fan girl moment and thanked the actors profusely. “Thanks for reciting my lyrics, @IanMcKellen and @SirPatStew! You’ve made my day,” shewrote. She added: “You two are ULTIMATE Squad Goals.”
source: people.com