Singer Psy, who is already known for having extremely sweaty underarms, unintentionally brought laughs as he exposed his sweaty behind on 'Superstar K4'.

On the August 24th,�Mnet's 'Superstar K4' broadcast the auditions held at a Korean military camp.

While watching the contestants, Psy became excited and decided to go up the stage himself. The 'global singer' started dancing to SISTAR's "Alone" and as he started doing the 'crane leg' dance, Psy completely exposed his sweaty bottom as he turned around. It seems after sitting for a long period to judge the contestants, he had built up a lot of sweat with the hot weather.

The other judges, singer Lee Seung Chul and Son Dam Bi,�as well as all the soldiers, were unable to hold back their laughter and shock as Psy continued to perform.

Source: News via Nate