If Britney Spears' wardrobe malfunction didn't cause a ruckus during her second show in Vegas last night (Dec. 30), then dominating Lance Bass in front of a live audience certainly did.

For the song in her act called "Freakshow," an audience member is plucked from the crowd and dressed in harnesses and cat ears before being paraded around the stage by Brit Brit.

And for her second show, that person just happened to be all around good-sport Lance Bass, who certainly didn't seem to mind getting into character for the role. Watch the video if you don't believe us.

Spears would go on Twitter to thank Bass for his participation, and her friend would hilariously respond in kind -- which is why these two have one of our favorite celebrity bromances.