The melody of What You Waiting For? by Gwen Stefani runs 418 notes across 85 bars, 3:09 long in Cm at 65 beats per minute. The tab sits almost entirely in the first two frets, one note at a time — no chords to barre and no strumming pattern to keep up with. A piano backing track plays the chords and bass underneath, so the line you are learning sounds like the record even at half speed.
Prefer to strum and sing it instead? What You Waiting For? chords and lyrics.