The trio, Joe, Nick and Kevin, called it quits in October after pulling the plug on their North American tour. They later revealed a series of furious bust-ups had prompted the split.
However, Jonas Brothers fans got the chance to see two-thirds of the boyband at the Kissmas Bash at the First Niagara Center in Buffalo when Joe and Nick rocked out on stage together, reported Contactmusic.
The duo sang a number of their former band's hits, and Joe took to Twitter after the event to thank the crowd for a warm welcome.
The pair didn't explain why their older brother Kevin missed the show.
The Wanted and Fifth Harmony also performed at the event.