Hailee Steinfeld
"So Smitten," the actress wrote on Instagram while tagging Cameron Smoller.
Gigi Hadid
"Everyday," the supermodel captioned her Valentine's Day Instagram with Zayn Malik.
Mark Wahlberg
"I never get to pick the movies anymore," the actor joked while seeing Fifty Shades Darker. "Happy Valentine's Day!"
Jessica Simpson
"Fifty Shades of Pink #ValentinesDay," the fashion designer shared on Instagram while posing with her hubby.
Jennifer Hudson
"Happy Valentine's dada @davidotunga," the American Idol alumna wrote on Instagram. "Let's see what we can get ourselves into tonight !!!"
Kris Jenner
"Stealing hearts mama," Rob Kardashian shared on Instagram as his daughter wore a pair of Freshly Picked Mocs.
Tom Sandoval
"Just US, doing US, being US on another adventure... life is just so much better with Dumplin's Chin on my shoulder," the Vanderpump Rules star shared on Instagram. "Happy Valentine's Day, Dumplin!"
Carrie Underwood
"A dinner date with my Valentine @mikefisher1212," the country music superstar shared on Twitter.
JoJo Fletcher & Becca Tilley
The Bachelor stars celebrate Galentine's Day at 102.7 KIISFM's Pick Your Purse party sponsored by Zeel and Surfair.
Aly Raisman
"Happy Valentine's Day to all," the Team USA athlete wrote with a few gifts.
Neil Patrick Harris
"Happy Valentine's Day from these two bundles of love! #cupids," the How I Met Your Mother star wrote on Instagram. Neil's son was spotted wearing Naturino high-top shoes.
Rosario Dawson & Eric Andre
Surprise! This undercover couple finally took their romance public on Valentine's Day. "Happy Valentines Day my love! #MyCuddlyValentine #Valentines," the actress captioned her sweet tribute to the comedian.
Gabrielle Union & Dwyane Wade
These longtime lovebirds couldn't help but share their love to the 'gram, singing along to rap classic "Nuthin' but a 'G' Thang." "#whenbffisbae," the actress captioned the video.
Madonna
The pop singer made the most of feeling under the weather, sharing a video of herself singing to Instagram captioned, "Sick Girl in bed in. Her nightgown. Not sung well but done with ♥️! Happy Valentine's Day!!"
Ariana Grande & Mac Miller
The "Side to Side" songstress decorated a keyboard with V-Day messages for her rapper beau, captioned with more than a few emojis.
Kim Kardashian and Kanye West
The reality star shared a photo kissing her man and wrote, "Happy Valentine's Day."
Maksim Chmerkovskiy and Peta Murgatroyd
The pair rang in Valentine's Day with their newborn baby, and Maksim wrote, "Happy V-Day to my absolute number one Thank you, I love you and I'm in love with us... #Family #babyChmerkovskiy #HappyValentinesDay."
Bristol Palin and Dakota Meyer
Sarah Palin's daughter shared this throwback photo. "2 years ago today, this handsome man took me on our 1st date!! It's been rainbows and butterfly kisses ever since," she wrote. "Just playinn!! We have seen some of the highest highs - and lowest lows, but I am so thankful for where God has brought us, you are the greatest husband, father, and best friend that I could've ever dreamt of. Thank you for all you do and sacrifice for our family, you are my world!!"
Miley Cyrus
The singer woke up like this! "Woke up in Muah @happyhippiefdn Special Valentines edition merch!!!!!!!"
Gwen Stefani and Blake Shelton
The No Doubt singer shared a photo kissing on her country-singing boo, writing, "#happyvalentinesday gx."
Towanda Braxton
The Braxton Family Values star celebrates the holidays with her kids at Buca di Beppo in New York City's Time Square.
Michelle and Barack Obama
The former FLOTUS posted a photo of her toes in the sand with President Obama and wrote, "Happy Valentine's Day to the love of my life and favorite island mate, @barackobama. #valentines."
Ruby Rose and Jessica Veronica
The Orange Is the New Black star created a sweet collage for her girlfriend, writing, "We have made some pretty bad decisions in our lives... mostly fashion related but one decision we have never regretted is loving each other.. happy Valentine's Day."
Penelop Disick
Kourtney Kardshian shared this photo of her daughter on Valentine's Day, looking precious in this amazing outfit.