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 . During this time , Aguilera started working on her follow-up studio album and embraced a new image inspired by figures of the Classic Hollywood era such as Marilyn Monroe , Marlene Dietrich , and Mary Pickford , debuting blonde curly hair and retro-styled makeup
48th Annual Grammy Awards
48th Annual Grammy Awards
Christina Aguilera