This song is about Damon Albarn's breakup with his girlfriend, Elastica frontwoman Justine Frischmann. In an interview with The Observer, Frischmann confessed that she cried the first time she heard this song, then became irritated and embarrassed, before her attitude finally softened.
Damon Alban and Graham Coxon of Blur wrote the song and the two bandmates shared the vocals on the track. The London Community Gospel Choir performed the backing vocals.
"Crank That (Soulja Boy)" was the most successful digital track of 2007 in the US with 2,909,000 downloads. On January 6, 2008 it became the first song ever to sell 3 million digital copies in the States.