Rob Fusari filed a $30.5 million lawsuit against the Grammy Award-winning performer, saying his protégé and former girlfriend ditched him as her career soared. "All business is personal," said the lawsuit, filed Wednesday in a Manhattan state court.

Lady Gaga's spokesman, Dave Tomberlin, didn't immediately respond to an e-mail sent Thursday by The Associated Press.

Fusari had credits on such hits as Will Smith's "Wild, Wild West" and Destiny's Child's "Bootylicious" when a friend steered the piano-playing singer — then known by her real name, Stefani Germanotta — to him in March 2006, according to his lawsuit.