Nicole Richie Hams It Up with Britney Spears in Vegas

Posted Wednesday February 19, 2014 1:33 PM GMT

She definitely knows how to have a good time, and Nicole Richie added a fun new dimension to Britney Spears' Las Vegas show on Tuesday night (February 18).

The “Simple Life” starlet was thrilled when Spears dedicated “Freak Show” to her during the gig, and ended up hopping up on stage.

From there, Britney gave Nicole a t-shirt with Spears’ picture on it and Richie crawled around on her hands and knees with delight.

After the concert, the “Toxic” songstress tweeted, "Can we all give a round of applause to @NicoleRichie for playing along in the show tonight? U looked hot crawling on all fours,” followed by a message directly to Nicole- "Thanks for dancing tonight!"

Photo Credit: Instagram