VIDEO: Kristen Wiig Dances to Sia's 'Chandelier' on Last Night's GRAMMY Stage!

Sia performed her hit song Chandelier on last night's GRAMMY AWARDS with the help of one surprising backup dancer - none other than SNL alum Kristen Wiig! Watch the performance below!

LL COOL J returned as host of the 57th Annual GRAMMY AWARDS last night, February 8th, in a ceremony that featured performances by AC/DC, Eric Church, Common, Ariana Grande, Miranda Lambert, John Legend,Madonna, Ed Sheeran, Sam Smith, Usher, Pharrell Williams and more!

Taking place at STAPLES Center in Los Angeles, Music's Biggest Night was broadcast live in high-definition TV and 5.1 surround sound on the CBS Television Network.

Click here for the full list of the night's winners!

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