7. A passionate duet featuring Katy Perry and her on-again, off-again, back-on-again boyfriend John Mayer
Why It Would Be Amazing: It would be both amazing and timely. Katy is performing her new song, "Roar." Mayer just put out his new album, Paradise Valley. And the two have a song on Katy's new album. Why not make things official by doing something together on the VMA stage at some point?
Photo Credit: Politico