Nicole Richie: Britney Spears 'Slave 4 U' Dance-Off!

Nicole Richie gets her groove on during a dance-off with her pal Scotty.

The 29-year-old fashion designer was challenged to show off her best moves while dancing along to Britney Spears‘ hit song, “I’m A Slave 4 U.”

“In honor of my queen @BritneySpears – Can’t wait to dance tonight!” Nicole tweeted a few hours before attending the pop princess’s Femme Fatale show, along with a link to her Facebook page with the video.

WHAT DO YOU THINK of Nicole Richie’s dancing?