"What You Waiting For?" is a song by American singer and songwriter Gwen Stefani from her debut solo studio album, Love. Angel. Music. Baby. (2004). Written by Stefani and Linda Perry, the song is the album's opening track and was released as Stefani's debut solo single. "What You Waiting For?" details Stefani's lack of inspiration, fear of producing the album, as well as her reaction to pressures exerted by her record label. It is primarily an electropop song and introduces Stefani's four back-up dancers, the Harajuku Girls, who had a major input into the album's production.