SEOUL - Korean rapper Psy raised eyebrows at a recent concert when he took to the stage wearing tight shorts and Madonna-esque conical breasts.

Known for his global hit Gangnam Style, the 37-year-old was performing a new song at his Dec 24 show at the Olympic Gymnastics Arena in Seoul in the outlandish outfit, reported the Daily Mail.

The K-Pop star twerked on stage with dancers who appeared to be dressed as Korean military officers, and even released fireworks from a fake breast at one point.

"My eyes need holy water," said YouTube user Lien Ly in a comment on a video of the performance, which was posted on Dec 24.

But others spoke in support of his bold costume and gender-bending dance moves.

"It's official - Psy is the Korean Miley Cyrus," added YouTube user Plank Plank.