Britney Spears Sued

5/29/2009 4:00 PM PDT

Britney Spears Sued

Britney Spears is being sued by the photog who got run over ... and we got the whole thing on tape.

Rick Mendoza was a casualty of Britney's Mercedes as she was pulling out of a Beverly Hills parking structure in 2007.

In his lawsuit, Mendoza says Britney's people -- who are also defendants -- "should have known...Britney was not in the mental, emotional and/or physical condition to operate the subject motor vehicle in a safe and reasonable manner."

She ran over his foot ... and it did look painful.

FOOTnote: TMZ auctioned off his sock.