Watch Nicole Richie Win a Britney Spears "I'm a Slave 4 U" Dance-Off!

Nicole Richie's friend Scotty challenged her to a Britney Spears dance-off even though Nicole warned him not to!

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"What was that Scotty? Do you REALLY want to challenge me to a Britney dance-off?" Nicole writes in the video she posted of the competition. "Okkaaaaaayyyy......"

“In honor of my queen @BritneySpears - Can’t wait to dance tonight!” Nicole Tweeted, before attending Britney's Femme Fatale concert, along with the video.

Nicole and Scotty dance along to Britney's hit "I'm a Slave 4 U" and the winner is clear!

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Watch the dance-off, below!