Has Kevin Hart joined Green Day? That's the scenario presented in the latest promo video for the 2012 MTV Video Music Awards, as the comedian wanders into the middle of a Green Day rehearsal session, unpacks a tuba and announces to Billie Joe and the boys that they have a new band mate. 

Apparently the promo clip reveals that Green Day have joined the lineup of performers lined up for the annual awards extravaganza, which will air live on Sept. 6 at 8PM ET/7PM CT on MTV, although it doesn't actually point this out. No matter -- watching Green Day interact with their supposed new mate is a barrel of laughs, except when he actually tries to play new single 'Oh Love' with the band. "We sound like s---," Hart announces, and we're not going to argue with him there.