Kelly Clarkson
Neil Mockford/FilmMagic; Dennis Van Tine/ABACAUSA.COM

While Mary-Kate Olsen recently traded her blond hair for a deep brunetKelly Clarkson did just the opposite and lightened her strands. The singer and Duets mentor was spotted in London yesterday with a warm cinnamon blond hue. Clarkson last had sheer gold highlights in 2009, and has experimented with varying shades of deep brown ever since. Tell us: Do you like her new look? Let us know in the comments!

Plus, see more celebrity hair makeovers.

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