During her performance of "Freak Show," Britney pulls someone up on stage and person gets tied up in bondage gear and paraded around on stage on a leash held by the pop star.
Lots of high-profile peeps have been leashed up by BritBrit, including Lance Bass, Mario Lopez and even Britney's own boyfriend David Lucado.
At Tuesday's show, however, Nicole Richie was the lucky audience member to get brought on stage to be walked by Brit and thanks to the adorable tweet she posted later, she proved that even she still gets starstruck sometimes.
"Can we all give a round of applause to @NicoleRichie for playing along in the show tonight? U looked hot crawling on all fours ;) " Britney tweeted after the show, to which Nicole replied "Am I alive?"
The reality star also shared some fun photos from the concert on her Instagram page, including one of her and the pop princess hanging out backstage.
We can't wait to see who Britney brings on next!