Hottest Girl in the World is a song by English boy band JLS, released as the official lead, and second overall, single from the group's fourth studio album, Evolution.

The track is a preview of the band's new-style material, which focuses on stronger harmonies and stripped back British R&B.

The song was written by the band, along with Dwayne Abernathy, Ali Tennant and Bangladesh, the latter of whom produced the track.

Jon Stickler of Stereoboard.com described the song as "a sleek, modern club song, showing maturity and progression, which takes the group out of pop territory.

"[3] The music video for the track premiered on JLS's official YouTube account on 10 September 2012.