Demi Lovato To Perform At 2012 MTV VMA Pre-Show!
Calvin Harris will also be on hand to play some of the hottest hits around...
Nominated in the Best Electronic Dance Music Video category, Harris will warm up the VMA crowd for an hour prior to the start of the main attraction.
Among the presenters also confirmed for the show are The Wanted, Andy Samberg, Rashida Jones, 2 Chainz, Ke$ha, Miley Cyrus, Wiz Khalifa, Mac Miller and the Fierce Five - the U.S. Women's Olympics Gymnastics Team that won the team gold medal at the Lodnon 2012 Olympic Games.
The show will be hosted by comedian Kevin Hart and you can catch all the action from the 2012 MTV VMA on Friday, 7th September at 9pm only on MTV!