Julianne Hough's must-see laugh attack

The newest DWTS' judge got a case of the giggles last night when Tommy Chong danced to Jason DeRulo's "Talk Dirty to Me" alongside his partner Peta Murgatroyd and guest dancer Sharna Burgess.

The entire panel couldn't stop laughing, but Julianne was especially speechless. "Honestly, I don't even know what to say," she managed to blurt out.

Despite the laughs, the comedian ended up with a solid score of 7/10 from each of the judges -- and he was the first of the contestants to make it through to the semi-finals next week.

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