But that would be alright by us.
"I've been waiting for a long time to do a duet with Demi," Kelly said, which is ironic considering that Demi has often said how much she looked up to Kelly when she was starting out. "Wow, she can sing her butt off!"
Lady Gaga headlined the NYC event and LMFAO, Mindless Behavior, David Guetta, Foster the People, Karmin and Gym Class Heroes also performed. For more on the night, check out the recap on MTV.