Lindsay Lohan held a beach party for autistic children - to make up for almost ruining their day trip. Volunteers for Smashbox Cares - a charity that teaches autistic youngsters how to surf - were left fuming after arriving at Carbon Beach, Malibu, on Monday and discovering their drop-off point was blocked by the Mean Girls actress' car.

Lohan had apparently parked it there ahead of her lavish 20th birthday party at the Polaroid Beach House the night before, but misplaced her keys and couldn't move the vehicle.

However, in an attempt to make amends the big-hearted bikini-clad actress - who is hugely popular with young moviegoers - played a three-hour DJ set for the children.

Some of Lohan's celebrity friends also joined the kids for the impromptu beach party, including former Friends star Matthew Perry, American Pie actress Shannon Elizabeth and Woody Harrelson.

Lindsay Lohan picture gallery