5 Colours in Her Hair

"5 Colours in Her Hair" is the debut single by English pop rock band McFly, released on 29 March 2004 as both the lead single from and the opening track of their debut album Room on the 3rd Floor. 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 at both the beginning and the ending of the song, with the music itself being indebted to 1960s surf and beat music, and was inspired by Susan Lee, a character played by actress Emily Corrie in the TV series As If, who wore coloured dreadlocks. The CD and 7-inch formats feature a duet with Busted singing a cover of the Kinks song "Lola".

The track debuted atop the UK Singles Chart on 4 April 2004, becoming the band's first number-one single, and stayed at the top for two weeks. Overall, it spent twelve weeks on the chart and also reached number seven in Ireland. The song was also nominated for The Record of the Year in 2004, but finished in second place just one point behind the winner, "Thunderbirds / 3AM" by Busted.