Lindsay Lohan, star of the movie "Mean Girls," threw herself a spectacular $100,000 20th birthday party in Malibu, Calif., with an all-star guest list.

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The guests at Sunday's no-holds-barred bash reportedly included Nicole Richie, Kate Bosworth, Courtney Love, Woody Harrelson, Owen Wilson and Eva Mendes, hellomagazine.com reported.

Lohan belted out Madonna songs over the karaoke machine and took turns with Dustin Hoffman's son Jake as disc jockey.

The actress spent the next day lounging on the beach, enjoying the July Fourth holiday weekend.