"5 Colours in Her Hair" is the debut single by English pop rock band McFly. It was also the band's first UK number one. It stayed at the top for two weeks. The song was written by Tom Fletcher, James Bourne, Danny Jones and Ben Sargeant. The track is especially well known for its "Doo, doo, doo, doo, doo, doo!" lyrics, played at the beginning and at the ending of the song. The CD and 7-inch formats features a duet with Busted singing a cover of the Kinks song "Lola".

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.