Demi Lovato, Selena Gomez and Miley Cyrus have each built successful careers transitioning from Disney darlings to pop stars. While Lovato admits to some friendly rivalry, she's still close with her Mickey Mouse friends -- including old co-stars the Jonas Brothers.

"I'm so excited for Selena, I'm so excited for Miley..." Lovato said about her Disney friends, who are also competitors at the 2013 Video Music Awards. "I get competitive as much as I love them. I do get competitive so I have to focus on myself and just be like it doesn't matter who has what, we are all equally successful, and in our lives it's a huge blessing. I'm so proud of everyone."

And let's not forget Lovato's other close Disney friends, theJonas Brothers, who just last week released their "First Time" video. Lovato starred alongside the boys on "Camp Rock" and at one time dated Joe, but reveals that it is younger brother Nick, that she's remained closest with.

"I really only hang out with Nick," Lovato said. "I'm cool with all of them. I'm really cool with all of them, but Nick is one of my really, really, really good friends. We don't get to see each other often but [when we do] it's so much fun. I'm sure if we could do that with all them, but we are never all together.