“B.O.B. (Zack de la Rocha Mix)” by Outkast

The countdowns caught Outkast's "B.O.B." in the mix that carries Zack de la Rocha's name, but underneath it sits a song built at breakneck speed. "B.O.B.", short for "Bombs Over Baghdad", was the lead single from Stankonia, the American rap duo's fourth studio album, in 2000, and Outkast produced it with Mr. DJ under the name Earthtone III.

The original is a glorious pileup: jittery drum-and-bass rhythms, Hendrix-flavored guitars, organs and gospel voices, all charging along at 155 beats per minute while André 3000 and Big Boi rap at a frantic clip to keep up. Big Boi said the aim was to break from the formula everyone else was following. It was never a huge seller, but Pitchfork, Rolling Stone and Blender have all counted it among the greatest songs ever made, and it drew fresh attention during the 2003 Iraq War.

Written with AI assistance from RockLists chart data, MusicBrainz and Wikipedia.