 "Billboard" announced Aguilera as the Top Female Pop Act of 2003.In 2004, Aguilera recorded a revised version of Rose Royce's "Car Wash" (1976) with Missy Elliott for the animated film "Shark Tale", in which she was a voice actress, and contributed vocals to Nelly's single "Tilt Ya Head Back".She was a featured artist on Herbie Hancock's 2005 cover of Leon Russell's "A Song for You" (1970), which was nominated for Best Pop Collaboration with Vocals at the 48th Annual Grammy Awards in February 2006.