Lindsay Lohan Turns Mean Girl as Jessica Simpson Forgets Her Manners  4/13/06

Lindsay Lohan and Jessica Simpson have sparked a new Hollywood feud after falling out in a Los Angeles nightclub.

The pair reportedly had a nasty run-in at Los Angeles' Dime club last week (06APR06) after Simpson failed to thank Lohan for a champagne gift.

According to America publication Us Weekly, Lohan sent Simpson a round of drinks and then confronted the busty blonde when she failed to say thanks, making The Dukes of Hazzard star cry.

Film-maker Brett Ratner, a fellow clubber, stepped into the fracas and tried to calm Herbie Fully Loaded star Lohan down, and convinced her to go back to her table.

Ratner has links to both girls - he directed Simpson's These Boots Are Made for Walkin') video and has reportedly quietly started dating Lohan, 19.

Lohan eventually returned to her group of friends and Simpson left shortly after the incident and flew to Australia the next day for a family vacation.