The most memorable part of episode 5 on "The X Factor USA" was a surprise appearance by a legendary rock star that has always had the "x factor" of his own. Gene Simmons, the most famous member of the iconic 70's rock band KISS, attended "The X Factor USA" season 2 auditions in San Francisco to support his daughter, Sophie Tweed-Simmons. Tweed-Simmons told the show's cameras in the pre-audition tape she had hoped the judges wouldn't learn who her parents are because wanted to be her "own person." Despite the declaration, the 19-year-old confirmed who her dad is unexpectedly.