Girls Just Wanna Have Fun

Carrie Underwood's radical '80s party! Demi Lovato and Gwyneth Paltrow's random hang! See your favorite female stars at play in their Twitter pics

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ASHLEE & LINDA

Ashlee Simpson stepped out to support pal Linda Perry when she performed at An Evening with Women, the singer-songwriter's charity event supporting gay women and friends. "One love :)" Simpson wrote.