Top 10 'Lip Sync Battle' performances

5. Julianne Hough "I Just Had Sex" vs. Derek Hough "Chandelier"

It's the battle of the Houghs as Derek channels his inner Sia in a white wig, but Julianne triumphs with her lip sync to The Lonely Island's "I Just Had Sex," which even made Chrissy Teigen look uncomfortable.

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