Nicole Richie  had a fangirl moment when she was pulled onstage during Britney Spears 's A Piece of Me show in Las Vegas on Tuesday night during a special S&M-themed performance. One fan captured the moment, albeit with the poor quality of a camera phone, which showed Nicole getting pushed on all fours by leather-clad hunks and being forced to walk like a dog while Britney held the leash. (Don't worry, it's much funnier than it sounds.) Nicole also shared the moment on Instagram, posting photos of her time on stage with Britney  and writing, simply, "Good bye."
Source: Instagram user nicolerichie 
Source: Instagram user nicolerichie