"That Girl" is a song by English pop rock band McFly. It was written by frontman Tom Fletcher and Busted's James Bourne. The song was released on 6 September 2004 as the lead single from the band's debut studio album Room on the 3rd Floor (2004). It was their first single not to reach the top spot in the UK Singles Chart, peaking at number three. In Ireland, it reached number 14.

McFly are an English pop rock/pop band formed in London in 2003. The band took their name from the Back to the Future character Marty McFly. The band consists of Tom Fletcher, Danny Jones, Dougie Poynter and Harry Judd (drums). They were signed to Island Records from their 2004 launch until December 2007, before creating their own label, Super Records.