Bridgit Mendler is a willowy, blond teen with a sweet singing voice and decent comic timing. She's also the show-biz equivalent of the next iPhone a young Disney star-in-waiting. Mendler, 16, is getting the full Disney Channel rollout. Introduced with recurring guest spots on two of its hit shows, Jonas and Wizards of Waverly Place , she will star in her own series, Good Luck Charlie , in 2010. "I've been told to brace myself," says Mendler. "If we have the success I hope we have with the show, everything will change."
Mendler is following a path to...