"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.
"These three people own my heart," the actor penned. "Happy Valentine's Day, everyone. #grateful"
"Happy Valentine's Day baby girl‼️ Daddy LOVES YOU," Rob tweeted.
"@maksimc I love you, but please get better, I'm running out of tea, honey and lemon #happyvalentinesday to us! Lol!" Murgatroyd wrote.
"Be your own Valentine, ladies," the actress wrote.
"#happyvalentinesday♥ @blakeshelton #i♥u #yourmyfavorite gx," Stefani wrote.
"Hey @sarahhyland, will you be my Valentine?" Adams wrote. "I love you +1 more than anything you say."
Hyland posted this photo of her and her man.
The Walking Dead star posted this photo of him and the Inglorious Basterds actress, with whom he shares a daughter, writing, "Best valentine."
"You make me very happy," the Riverdale actress wrote to her co-star. "Happy Valentine's Day, my love."
"U deserve all the candy," she wrote. "Happy Valentine's Day loves."
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."
"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."
"Happy Valentine's Day @daniellejonas be mine...always," he wrote.
The singer poses with her love of her life, her son. "Will u be my Valentine #axljack?" she wrote.
"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."
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!"
The ladies of Parks & Recreation reunite for their annual Galentine's Day celebration.
The singer-songwriters attend Amazon's Valentine's Day Pup-Up in Los Angeles with their daughter and pooch.
Khloe Kardashian's baby girl gets in the V-Day with a red velour sweatsuit.
The author and bride-to-be hosts a Galentine's Day event at Alo Yoga Studio in Beverly Hills.
The Jersey Shore star treats daughter Meilani to an "early Valentine's Day present" by going to see Frozen the Musical.
Kourtney Kardashian's little girl unwraps presents she received from Cupid.
The Twilight alum is all smiles at Amazon's Valentine's Day Pup-Up.