Billed by MTV as the VMA Dream Team, vocal powerhouses Bruno Mars and Hayley Williams joined B.o.B for a medley that included the group’s summer charttoppers “Airplanes” and “Nothing On You” during Sunday night’s 2010 Video Music Awards — live for Los Angeles. Here’s a video!

Your favorite artist has “Got Nothing On” the “Magic” of B.O.B. and Rivers Cuomo.

This just in: B.o.B. and teen sensation Justin Bieber will perform at the annual MTV Video Music Awards next month, the network announced on Wednesday.

Bieber, who is a shoo-in for the coveted Best New Artist prize, and B.o.B, who received 5 nominations, have been added to the star-studded roster of performers — including Kanye, Drake, and Florence + The Machine — tapped to take the VMA stage as MTV celebrates the year’s best music videos.

We’ve also learned that grungy singing star Ke$ha and Twilight’s Ashley Greene have been added to the list of presenters.

The 2010 MTV Video Music Awards will air live from the Nokia Theater in Los Angeles on Sunday, Sept. 12 @ 9 PM.