Panic! At The Disco were joined by several special guests as they wrapped up their summer tour with Weezer in Irvine California this weekend.
First, as Brendon talked through the inspiration behind "This Is Gospel", former drummer Spencer Smith came onstage to huge cheers.
His brief cameo marks his first sighting with the band since he successfully completed rehab to treat his alcoholism.
Watch the moment Panic! briefly reunited below:
SOUND WARNING: Okay so here's where Spencer came out to give Brendon his guitar for This Is Gospel!!! Also, warning for other videos, my sound quality isn't that great bc of where I am and the vid quality isn't amazing because I have the iPhone 5c. But all the same the content is good!!! #spencersmith #panicatthedisco #brendonurie #dallonweekes #kennethharris #danpawlovich #patd
Then, as if that wasn't exciting enough, the band's mentor even stopped by.
"Victorious" saw an extra appearance from FOB's Pete Wentz, waving a huge flag onstage through the song.