"The World's Greatest" is a song written and recorded by R&B singer R. Kelly. The song was originally featured on the soundtrack to the film Ali, and also appeared on bootleg copies of Kelly's unreleased album, Loveland, which later became a bonus disc to Chocolate Factory. It was covered by folk singer Bonnie Prince Billy on his 2007 EP Ask Forgiveness.
The music video is directed by Bille Woodruff. Kelly is a boxer in this video, playing the part of Muhammad Ali, as this song was originally a tribute to him. There is no color in the video except for red, Kelly's boxing clothes happen to have that color.