Epic Dance-Off On ‘SNL’ (VIDEO)

No doubt you've seen the video for Sia's "Chandelier" with Maggie Ziegler, who dances in the video sporting a wig and a nude leotard. Apparently, it inspired Jim Carrey and Kate McKinnon in this "Saturday Night Live" sketch which culminates in a dance-off for the ages that even musical guest Iggy Azalea can't help but join in.