"What You Waiting For?"
Love. Angel. Music. Baby.
Trivia: Indie rock band Franz Ferdinandperformed this song in their appearance on BBC Radio 1's Live Lounge, where it is traditional for well-known artists and bands to perform a cover of a popular recent hit by another artist, often one of quite a different style. I have a recording of that as well that I may put up sometime if requested (or it's also on the first Live Lounge compilation album, along with quite a few other awesome covers I'd recommend: follow the link to check out new/used prices on Amazon).
Get Gwen Stefani's awesome debut album Love. Angel. Music. Baby.