Disney's hunks go girl-crazy for Cosmo Girl!

It's hard to imagine teen rockers THE JONAS BROTHERS without lead singer JOE, but believe it or not, being a rock star was the last thing on the heartthrob's mind, he reveals, in a special new issue of COSMO Girl!, on stands June 17th! 

"I was totally not down with singing," Joe says. "I was trying to be cool and just wanted to skateboard and be the funny guy." He changed his tune, however, when he saw how girls reacted to the singing debuts of his brothers, NICK and KEVIN. "Seeing the reactions they got from the girls, I was like, 'Maybe I should try and sing,'" he says. "And then I fell in love with it."

Joe, 18, Nick, 15, and Kevin, 20, are on the cover of the mag's extra-special Jonas edition talking about everything from girls to their upcoming Disney Channel movie, "Camp Rock," which premieres on June 20. In the flick, Joe plays a bratty rocker who gets sent to an expensive music camp to straighten up. Naturally, he falls for a girl, played by DEMI LOVATO.

In real life, Joe's been linked to singer JO JO, but he's quick to shush those rumors!

"She's a friend, and she came to our concert in Boston," he explains. "She had on super-high heels, and I was helping her through the snow as I would for my mom or any girl. Someone took pictures, and suddenly we become 'JoJoJoeJo.' I just laughed because it was ridiculous."