AMA 2013 one Direction Story of My life AMA 2013 Lady Gaga Red Carpet interview AMA 2013 Imagine Dragons performance Radioactive AMA 2013 Ariana Grande performance Tattooed Heart AMA 2013 Pitbull and Kesha live performance Timber AMA 2013 Justin Timberlake performance AMA 2013 Florida Georgia Line featuring Nelly performance Cruise AMA 2013 Rihanna performance Diamonds AMA 2013 Macklemore & Ryan Lewis featuring Ray Dalton Can't Hold Us performance