Cheryl Cole used a recent hook-up with Will.i.am in Los Angeles to vent her anger at husband Ashley Cole's alleged infidelity.

The Girls Aloud star performed backing vocals in a track with the Black Eyed Peas star titled 'Heartbreaker', during a stint in the US while filming a new documentary 'THe Passions of Girls Aloud'.

Each band member was invited to achieve an ambition away from their pop career, with Cole taking up street dancing.

A source revealed to a Sunday tabloid paper, "For her documentary, Cheryl was originally just meant to be part of the dance troupe for Will.i.am’s song - but he asked her to do backing vocals," said a source.

"The track is called 'Heartbreaker' - all about men treating their partners like dirt and cheating on them. Will sings a line admitting he has cheated and Cheryl sings back that he has been an effing jerk. Recording the vocal was quite cathartic for her. She used it to let off some steam.

"When she sings the line, she really means it - no question."

According to reports, Cole sings the line, "You f***ing jerk!"