Lady Gaga
"Happy Valentine's Day. A tattoo toast to "la vie en rose" by the beautiful @winterstone my spinal cord is now a rose," the singer and actress wrote.
Neil Patrick Harris & David Burtka
"These three people own my heart," the actor penned. "Happy Valentine's Day, everyone. #grateful"
Rob Kardashian & Dream Kardashian
"Happy Valentine's Day baby girl‼️ Daddy LOVES YOU," Rob tweeted.
Peta Murgatroyd & Maksin Chmerkovskiy
"@maksimc I love you, but please get better, I'm running out of tea, honey and lemon #happyvalentinesday to us! Lol!" Murgatroyd wrote.
Halle Berry
"Be your own Valentine, ladies," the actress wrote.
Gwen Stefani & Blake Shelton
"#happyvalentinesday♥ @blakeshelton #i♥u #yourmyfavorite gx," Stefani wrote.
Sarah Hyland & Wells Adams
"Hey @sarahhyland, will you be my Valentine?" Adams wrote. "I love you +1 more than anything you say."
Sarah Hyland & Wells Adams
Hyland posted this photo of her and her man.
Diane Kruger & Norman Reedus
The Walking Dead star posted this photo of him and the Inglorious Basterds actress, with whom he shares a daughter, writing, "Best valentine."
Cole Sprouse & Lili Reinhart
"You make me very happy," the Riverdale actress wrote to her co-star. "Happy Valentine's Day, my love."
Bella Thorne
"U deserve all the candy," she wrote. "Happy Valentine's Day loves."
Kyle Richards Umansky & Mauricio Umansky
The Real Housewives of Beverly Hills star shared this throwback photo of her and her husband, "Happy Valentine's Day to my forever Valentine...Today marks our 25th Valentine's Day together. I love you more every day."
Ashley Tisdale & Christopher French
"I'm still trying to figure out how I got to be your forever valentine," the actress wrote to her husband, Christopher French. "But I think it was the moment I chose to love myself that you came into my life. Happy Valentines Day @cmfrench I'm the luckiest girl."
Kevin Jonas & Danielle Jonas
"Happy Valentine's Day @daniellejonas be mine...always," he wrote.
Fergie
The singer poses with her love of her life, her son. "Will u be my Valentine #axljack?" she wrote.
Padma Lakshmi
"Give yourself some lovin' today," the Top Chef host wrote. "PSA: don't be duped by all the marketing hype- you don't need anyone else to prove you're worthy. Happy Valentines Day from me to you & from you to you. #valentinesday #vday #youretheone."
Kim Kardashian & Kanye West
The Keeping Up With the Kardashians star shared this never-before-seen photo of herself with her husband, writing, "Happy Valentines Day babe!!! I love you so much!"
Amy Poehler, Aubrey Plaza & Rashida Jones
The ladies of Parks & Recreation reunite for their annual Galentine's Day celebration.
Ashlee Simpson & Evan Ross
The singer-songwriters attend Amazon's Valentine's Day Pup-Up in Los Angeles with their daughter and pooch.
True Thompson
Khloe Kardashian's baby girl gets in the V-Day with a red velour sweatsuit.
Katherine Schwarzenegger
The author and bride-to-be hosts a Galentine's Day event at Alo Yoga Studio in Beverly Hills.
Jenni "JWoww" Farley
The Jersey Shore star treats daughter Meilani to an "early Valentine's Day present" by going to see Frozen the Musical.
Penelope Disick
Kourtney Kardashian's little girl unwraps presents she received from Cupid.
Nikki Reed
The Twilight alum is all smiles at Amazon's Valentine's Day Pup-Up.