Rumer Willis celebrated her 21st birthday at TAO Las Vegas on Saturday. She traded in her recent red locks for more natural dark brown hair. What do you think of Rumer's look? See more photos after the jump...

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Bruce Willis and Demi Moore's eldest daughter is set to star in 90210 as punk lesbian Gia later this year. The cast are all eager to share some steamy scenes with the Hollywood offspring - especially Annalynne McCord, who plays catty student Naomi Clark. She wants to do a liplock with Rumer!

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Rumer refused to take any favo...