After plenty of speculation and a few visible baby bumps, the former 'N Sync member finally confirmed the exciting baby news on his birthday Saturday.
"Thank you EVERYONE for the Bday wishes!," he captioned on Instagram. "This year, I'm getting the GREATEST GIFT EVER. CAN'T WAIT. #BoyOrGirl #YouNeverKnow #WeDontEvenKnow #WeAreTakingBets"