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Justin Timberlake

Justin Timberlake is celebrating his 34th birthday today, January 31st, and he used the opportunity to tell the world about another very important birthday that's coming up: the birth of his child!

On Saturday, Justin posted a photo to Instagram of himself kissing his wife's baby bump, FINALLY confirming that he and Jessica Biel are, in fact, expecting. He's even taking bets about whether the baby is going to be a boy or a girl!

He captioned the pic, "Thank you EVERYONE for the Bday wishes! This year, I'm getting the GREATEST GIFT EVER. CAN'T WAIT.#BoyOrGirl #YouNeverKnow #WeDontEvenKnow#WeAreTakingBets.