What goes on in Vegas most certainly will NOT stay in Vegas here!
Watch it go down (below)!!!
They spoofed the Biebs' Believe cover!
limited-edition Ain't It Fun singles coming soon!
Seems like there isn't any bad blood between the two musical stars!
Well, as long as Bieberoni doesn't throw a fit because of Hayley Williams and her crew'd AH-Mazing come back!