Troubled soul singer Amy Winehouse apologized on Monday for singing a racist chant, footage of which was obtained by News of the World.

Winehouse, 24, stood outside her north London home, telling paparazzi that she was sorry, adding: "I don't want to play anything down, but I'm the least racist person going."

In the video, shot around May 2007, Winehouse and a friend giggle as they sing a string of racist lines set to the tune of the children's song "Heads, Shoulders, Knees and Toes." Winehouse sings: "Blacks, Pakis, Gooks and Nips, Gooks and Nips! And deaf and dumb and blind and gay!"

Click here for the News of the World report and to see video and photos

She repeats the first line over again and on the word "Nips" pulls her eyes into slits.

The video takes place in a dingy crack den, according to News of the World. The scenes were filmed by Winehouse's husband Blake Fielder-Civil, and the video was reportedly given to News of the World by a former friend determined to show how Fielder-Civil manipulates his wife, according to the British tabloid.

Purported still photos from the footage also show Winehouse and Fielder-Civil swapping white tablets from mouth to mouth. Another photo catches Winehouse clutching what News of the World says is a homemade crack pipe.

Further scenes from the purported video show Winehouse performing a sexual act on Fielder-Civil with her hand. Also in the footage, Fielder-Civil asks Winehouse to perform oral sex on him. She asks: "Are you vidding (videoing)?" and Fielder-Civil tells her to wink at the camera.

In January, Winehouse appeared to be smoking crack on a video that was handed over to the London police. Cops questioned her for nine hours but declined to press charges.

The Grammy-winning singer went to rehab earlier this year.

Fielder-Civil pleaded guilty last week to committing "grievous bodily harm" on a pub owner and conspiring to "pervert the course of justice," it was reported on Monday.

The Associated Pres contributed to this report.