MUSIC NEWS - It seems the big question this weekend is "who is that female guitar player in the Michael Jackson This Is It movie?" Well, the talented, attractive guitar ace in none other than Orianthi, the Aussie guitar wiz. Originally noticed by music legend Carlos Santana. After playing with artists like Carrie Underwood, ZZ Top, and Prince, she received a MySpace message from Michael Jackson's musical director asking her to audition for MJ's comeback tour. With her new solo album, Believe