MTV just brought out the big guns. They've added Frank Ocean and Rihanna to the roster for 2012 Video Music Awards. The superstars will join the likes of Taylor Swift, One Direction, Green Day, and Pink. Frank Ocean is up for Best New Artist and his "Swim Good" is nominated for Best Direction and Best Male Video, while Rihanna ties Drake for most nominations this year with five each. MTV has added more presenters to the line up as well, bringing the Wanted Andy Samberg, 2 Chainz, Rashida Jones, and Ke$ha in to the fold with Miley Cyrus, Wiz Khalifa, Mac Miller. The "Fab Five," the U.S Women's Olypics Gymnastics Team that won the team gold at the London Olympics will also present. Hosting the whole spectacle will be comedian Kevin Hart. The VMAs will air on Thursday September 6.