Nicole Richie is apparently a Britney Spears superfan. The Winter Kate designer tweeted a video of herself and a friend engaged in a dance-off to 'I'm a Slave 4 U' before heading to the Femme Fatale tour stop in Los Angeles on Monday.

"In honor of my queen, @BritneySpears -- Can't wait to dance tonight!" she wrote along with a link to the video, which begins with the question: "Do you REALLY want to challenge me to a Britney dance-off?"

In the video, Richie shows the world that she has rhythm. Wearing a white top and denim shorts, the reality star launches her dance moves alongside a male friend, who ultimately can't keep up with the mother-of-two's skills.

The 29-year-old is an avid music fan, who has been seen at many concerts, including this year's Coachella Valley Music and Arts Festival in Indio, Calif. Richie, who often tweets about music, is also married to Good Charlotte's Joel Madden, who was not in the video as he is currently on tour with Yellowcard.

The Femme Fatale tour kicked off on Friday, June 17 in Sacramento, Calif., and will continue for the next two months through August 13.

Watch Nicole Richie Dance to Britney Spears' 'I'm a Slave 4 U'