We're thinking that two of the three Jonas Brothers who played a reunion show this week might be burnin' up that the third brother didn't participate. 

The Jonas Brothers performed at KISS-FM's Kissmas Bash in Buffalo, NY, on December 12, but only Nick and Joe Jonas took part in the concert, as Kevin Jonas was nowhere to be seen, according to Us Weekly. 

Credit: Danielle Jonas on Instagram

Nick and Joe performed the group's biggest hits to a cheering crowd, but there was no word as to why Kevin, 26, was not there. 

Nick and Joe appeared to have a great time at the show. "Buffalo, you were awesome last night. Thanks!" Nick, 21, tweeted after the show, with Joe, 24, tweeting, "We had a great time last night  thank you, Buffalo, for makin our wildest dreams come true. All of them. #boom."

As for Kevin  who stars on the reality show Married to Jonas and is expecting his first child with pregnant wife Danielle Jonas  he made no mention of the concert on Twitter. Instead, he posted a docile photo of himself and his wife in jammies the next day.

The band parted ways in October 2013 after canceling their tour, citing a "deep rift" within the group. "There was a big disagreement over their music direction," said the band's spokesperson at the time. 

Indeed, Kevin admitted at the time that he stopped helping with the band's new songs, saying: "I wasn't contributing to the music the way I should have." So perhaps Kevin was the one who didn't want to move forward with the band?

What do you think of Kevin not performing with his brothers? And do you think the band will move on without him?

Source: Us Weekly