The singer-actress performed at Conde Nast's Fashion Rocks concert in New York at Radio City Music Hall overnight.Lopez has won a permanent injunction barring her ex-spouse, Ojani Noa, from disclosing information about their relationship for personal gain.Noa also was ordered to turn over all materials related to the book.The unpublished book reportedly alleges that Lopez had multiple affairs during her 11-month marriage to Noa, including one with salsa-singer Marc Anthony, her third and current husband.Other stars to perform at Fashion Rocks include Aerosmith, Fergie, Usher and Avril Lavigne.