VIDEO: Kathy Griffin Joins Britney Spears on Stage for Vegas 'Freakshow' Performance

At Britney Spear's Las Vegas performance this past Saturday, the pop star pulled up audience member Kathy Griffin to join her in the performance of 'Freakshow.' Check it out below!

A legendary pop icon, Britney has captivated the world with show stopping performances for more than 15 years. Now she is brings her most spectacular show ever to Planet Hollywood Resort & Casino in Las Vegas. "Britney: Piece of Me" is a celebration of one of the most illustrious careers in music history, boasting more than 20 worldwide hits from one of the most iconic artists ever to grace the stage. Audiences will be enthralled as Britney re-imagines some of the greatest performance moments of her career, along with a glimpse of brand new material from her eighth studio album, "Britney Jean."

"Britney: Piece of Me" is not only for die-hard fans, but for anyone who enjoys pop theater at its finest. Presented in a fully-reconstructedtheater at Planet Hollywood Resort & Casino, the show will feature one of the largest indoor immersive stage productions in the world, creating what will be the mostcutting-edge pop concert experience ever produced for Las Vegas.While the stage production is dazzling, the intimately-sized theater will allow audiences to see Britney as they've never seen her before. In keeping with Britney's style and innovation, "Britney: Piece of Me" is a marriage of high-end fashion and state-of-the-art technology, housed in a nightclub/ theater complete with exclusive table and bottle service.