Buble, 41, has two children with wife Luisana Lopilato, 29 (3-year-old son Noah and 8-month-old son Elias) and they've been spending so much time with their dad that Noah might have caught the singing bug.
Lopilato shared an Instagram video of the toddler testing out a microphone on Buble's birthday earlier this month.
"I don't want this day to finish without telling you how much we love you, how much fun we have with you, and how much better you make each day!" Lopilato wrote in the caption. "Thanks for being the best Papi!"
Michael Buble: Tour Stop 148 is in theaters for one night only on Sept. 27. Click here for tickets! His new album, Nobody But Me, drops Oct. 21.