 The album opens with " What You Waiting For ? " , an electropop , new wave , dance @-@ rock , and funk song . Lyrically , the song discusses Stefani 's fears of beginning a solo career . " Rich Girl " , a collaboration with rapper Eve , is a dancehall and reggae reworking of the English duo Louchie Lou & Michie One 's 1994 song " If I Was a Rich Girl " , which itself interpolates the song " If I Were a Rich Man " from the 1964 musical Fiddler on the Roof . The Neptunes @-@ produced track " Hollaback Girl " combines 1980s hip hop with dance music . It was written as a response to a derogatory comment that grunge musician Courtney Love made , referring to Stefani as a cheerleader . 
