 At the Billboard Music Awards , Stefani won the Digital Song of the Year award for " Hollaback Girl " and the New Artist of the Year Award , and she performed " Luxurious " with Slim Thug at the event . At the 2005 Grammy Awards , Stefani received a nomination for Best Female Pop Vocal Performance for " What You Waiting For ? " and performed " Rich Girl " with Eve . At the next year 's awards , Stefani received five nominations for Record of the Year , Album of the Year , Best Female Pop Vocal Performance , Best Pop Vocal Album , and Best Rap / Sung Collaboration . 
