02/19/2014 10:11 am ET Updated Feb 20, 2014

Nicole Richie Leashed & Walked Like A Dog At Britney Spears Show

It's no secret that Nicole Richie is a Britney Spears enthusiast, which is why Spears must have known the former "Simple Life" star could endure the super fan treatment.

On Tuesday (Feb. 19), Richie was chosen to join Spears on stage during Spears' resident show in Las Vegas. Richie was made to don a spiked leather harness to mark the occasion. The 32-year-old rather gleefully got on all fours as Spears walked her like a dog -- leash and all. The singer was decked out in a sexy dominatrix-inspired outfit while singing "Freakshow."

Richie was compensated for being a good sport with an oversized concert t-shirt (and the memories, of course). Meanwhile, Spears tweeted after the show, "Can we all give a round of applause to @NicoleRichie for playing along in the show tonight? U looked hot crawling on all fours ;)"

In the past, Spears' own boyfriend, David Lucado, Mario Lopez and Lance Bass were all lucky enough to receive the same treatment, while Paris Hilton, Lady Gaga and Britney super fan, Miley Cyrus, somehow managed to avoid finding themselves at the end of Spears' leash.