Lily Allen attacked a paparazzo in London last night (12.03.09).
The 23-year-old singer punched, kicked and threw a water bottle at the photographer after he drove into her car as she arrived at a recording studio.
An onlooker told Britain's Daily Star newspaper: "The guy's car nudged Lily's and the next thing anyone knew she was out and flailing. Her security team had to pull her off.
"She was punching and kicking. She's not someone who will take something like that lying down. She certainly let the bloke know what she thought of him."
Lily's spokesman said the car crash had caused her "extreme distress and shock".
He added: "There were seven vehicles pursuing her - 14 photographers - and they even shot a red light."
Fans fear the attack might put Lily's upcoming US tour in jeopardy. If the feisty singer is charged with assault, she will not be granted an American work visa.
Fellow British star Amy Winehouse has been forced to cancel an appearance at the Coachella Festival in California next month because she can't get a visa.
It's not the first time 'The Fear' singer has lashed out at photographers.
She was arrested in 2007 after she punched a snapper outside a London club, leaving him with a bloody nose. She received a police caution over the incident.