He often appears on songs of other artists as diverse as Kelly Rowland and teen heartthrob Joe Jonas.

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Joe Jonas, a member of the popular pop-rock trio, the Jonas Brothers, is in third place with a score of 92.

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The bubbly 16-year-old burst onto the scene back in June, when she appeared opposite Joe Jonas in the Disney Channel's heavily hyped and much-watched flick Camp Rock.

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The star also recently suffered the traumatic teenage blows of breaking up with her boyfriend (fellow tourmate Joe Jonas) and a rumored falling out with BFF Selena Gomez.

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In 2008, Camp Rock was written as a vehicle for the Jonas Brothers: Nick, Joe and Kevin, who were at the height of their musical careers (think Justin Bieber craziness), but it was Lovato, then 16 and a newcomer to the Disney talent stable, who was the breakout star.

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Once a struggling Christian rock group, brothers Nick, Joe and Kevin--better known as the Jonas Brothers--owned the spotlight all year.

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