"The World's Greatest" is a song written and performed by American 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. Released as a single in November 2001, "The World's Greatest" became a hit in Europe, reaching number two in the Netherlands, number four in the United Kingdom, and the top 20 in nine other European countries. In the United States, it peaked at number 34 on the Billboard Hot 100.

Robert Sylvester Kelly is an American former singer, songwriter, and record producer. He is credited with prolific commercial success in R&B, hip hop, and pop music recordings, earning nicknames such as "the King of R&B", "the King of Pop-Soul", and "the Pied Piper of R&B". Kelly's career ended in 2019 following his arrest and subsequent convictions on federal racketeering and sex trafficking charges involving sexual abuse of minors, for which he was arrested that same year.