Robot Boy by Linkin Park

"Robot Boy", despite its seemingly simple premise, is one of the most complex songs on A Thousand Suns. In many cases, Shinoda and Bennington would record and double melodies and harmonies, then choose the "vocal hierarchy" during mixdown. With multiple tracks to choose from, they were able to blend and fade between each singer. "Robot Boy", for example, begins its first of three separate movements with six overlaying vocals — one main and two harmonies .