The trio, Joe, Nick and Kevin, called it quits in October (13) 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 Kiss 98.5 Fm's Kissmas Bash at the First Niagara Center in Buffalo when Joe and Nick rocked out on stage together.
The duo sang a number of their former band's hits, and Joe took to Twitter.com after the event to thank the crowd for a warm welcome.
He wrote, "We had a great time last night thank you Buffalo for makin our wildest dreams come true. All of them."
The pair didn't explain why their older brother Kevin missed the show.
The Wanted and Fifth Harmony also performed at the event.