by Claudine Zap Whitney Houston may be struggling with her career, but her sound-alike is hitting a high note . The Taiwanese singing sensation Lin Yu-Chun , who rose from obscurity to YouTube stardom thanks to the Taiwan version of "American Idol," is now a true star with a record deal from Sony . Houston was supposed to be on a comeback tour, but instead she's being told never to come back. The artist's performance was called "a national scandal" by London's Independent,