Comedian Kevin Hart hosts the 29th annual bash at the Staples Center in Los Angeles. Scheduled performers include Taylor Swift; Rihanna; Green Day; One Direction; Alicia Keys; and Pink. Presenters include the 2012 U.S. women’s gymnastics team; Andy Samberg; Miley Cyrus; Wiz Khalifa; Mac Miller; Rashida Jones; the Wanted; 2 Chainz; and Ke$ha.