By Jane Asher
Updated Aug 23, 2016 @ 5:54 pm
Gabriel Olsen/Getty

Backstreet's definitely back and Nick Carter is rocking his body (we had to) and getting in an impromptu workout with his 4-month-old son, Odin Reign. The Backstreet Boys singer took to Instagram to show fans how he's preparing for the quintet's yet-to-be-officially-announced tour. "Trying to get back into #boyband shape with my little buddy for our next #backstreetboys album and tour. Pushing a stroller is crazy cardio lol. #babies #baby #fitness," he captioned the shot, in which Odin looks just like his dad, with big blue eyes that stare right into the camera.

The Boys have been busy working on their new album, and just last week Carter posted a snap of baby Odin in the recording studio with him. But it's not the only thing they've got in the works: The band also recently confirmed that a trial run for their Vegas residency is happening. 

WATCH: Meghan Trainor Delivers an Epic Performance of "I Want It That Way" with the Backstreet Boys

Any Backstreet Boys reunion is amazing in our eyes, and we can't wait for more details.