Just Who Are the Jonas Brothers?

Lately, the Jonas Brothers have been "Burnin' Up" the charts. In advance of their live performance on "Good Morning America" Friday (click here for the full Summer Concert Series schedule), find out more about these rockin' New Jersey siblings. The "Jo Bros" -- Kevin, 20; Joe, 18; and Nick, 15 -- got their big break last year as the opening act for Miley Cyrus. Kevin plays guitar, Joe sings lead and youngest brother, Nick, is known as the "president" or "musical mastermind" of the...Full Story