Grammy Nominations 2017

Watch Derek Hough's Horrified Face as Sister Julianne Gets Raunchy for 'Lip Sync Battle'

Courtesy of Spike TV
Julianne Hough performs on Spike TV's Lip Sync Battle against her brother, Derek Hough.

Watching your sibling bump and grind on national TV must be a special kind of horror show. Derek Hough knows all about it. 

In this clip from the next episode of Spike’s Lip Sync Battle, the pro dancer and choreography has to endure watching his sister Julianne perform a smoking hot routine to The Lonely Island’s spoof song "I Just Had Sex".

'Lip Sync Battle' Recap: Stephen Merchant & 'Adorable Gangster' Malin Akerman Get Really Dirty

Julianne, the two-time Dancing with the Stars champ, is dressed to impress for her provocative on-stage stint. You can just see the expression of “ewwwww” etched in Derek’s face. 

The episode will air this Thursday (May 14) at 10 p.m. ET on Spike. Watch the preview below.