A pint-sized guitarist, 10-year-old Bay Melnick Virgolino, had the America's Got Talent audience rocking out on Monday's second round of the quarterfinals. He is young, yes, but not shy about showing celebrity judges Mel B, Simon Cowell, Howie Mandel, and Sofia Vergara what he could do with Joan Jett & the Blackhearts' "I Love Rock 'n' Roll" in the last moments of the live episode. They were loving it as much as the crowd. "Wow, wow, wow!" Vergara said. "What a way to close the show. You're like a mini rock star!" SNIP