06/21/2011 at 08:00 AM EDT
Hot mom alert! In anticipation of Britney Spears
' Femme Fatale
concert stop Monday night in Los Angeles, Nicole Richie
Tweeted a video of herself and a male friend engaged in a silly, spontaneous "dance off" to the pop star's hit "Slave 4 U."
"In honor of my queen, @BritneySpears - Can't wait to dance tonight!" She Tweeted
In the video, the mother of two showed some impressively fluid and sexy moves alongside her male friend – who didn't fare as well in the impromptu dance challenge.
The Winter Kate
designer and reality star, 29, was dressed casually in tiny denim shorts and a white tank while her friends whooped and cheered her on in the background.