Valentine's Day 2018: Stars take to Instagram to celebrate love

Love is in the air -- and on the internet!

Celebrities took to Instagram to share some pink, red and heart-shaped cheer on this very happy Valentine's Day. Whether they were acknowledging their own relationships or just sending their fans some love, there's plenty of positivity to go around today.

Alec Baldwin filmed an emotional video message for his wife Hilaria, choking up in the minute-long clip as he thanked her for "everything you've given to me." The couple is currently expecting their fourth child.

Meanwhile, CNN host Don Lemon baked a heart-shaped chocolate cake for boyfriend Tim Malone, and both men had cards waiting for each other. (And yes, he really did bake the cake.) See all the snapshots in the gallery below.