Los Angeles - Lady Gaga, a survivor of sexual assault, says performing Till It Happens to You ? her song about sexual abuse on college campuses ? at Sunday's Academy Awards will feel liberating and emancipating. "It's something in my life that's always really kind of defined me up until this point. In a strange way I feel like it won't define me anymore after I sing it on TV at the Oscars, if I can let it go maybe," Gaga said in a recent interview with The Associated Press.