Demi Lovato and Katy Perry is it love?

Demi Lovato has never met Katy Perry before, and for some reason doesn't plan too, but when her and Katy have to perform together and Demi meets Katy for the first time it takes her a moment to warm up to Katy. Is it going to be the tension that makes them want to tear one another up or the type of tension that keeps...