The 26-year-old dancer and entertainer was seen grinding on stage to the suggestive song – it even made her brother Derek give a look of shock!
Julianne faces off against her big bro in the upcoming episode of Lip Sync Battle on Spike TV this coming Thursday. Be sure to watch!
Check out the clip of Julianne‘s “I Just Had Sex” performance below.
Julianne Hough on ‘Lip Sync Battle’