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New dad Nick Carter shared a selfie with son Odin, 3 months, via Instagram Tuesday.

“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,” the Backstreet Boys star, 36, captioned the image with his son in the stroller.

Last week, the singer shared a shot with his tot in the studio.

“Hanging with daddy for the first time at the studio while we record a song for the new @backstreetboys album. #babies #newmusic #backstreetboys,” Carter captioned the image cuddling his newborn.

Last month, the inked papa shared a shot cuddling his baby boy.

The Everybody hitmaker and wife Lauren Kitt Carter welcomed their first child on April 19.

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

A photo posted by Nick Carter (@nickcarter) on Aug 23, 2016 at 10:03am PDT