'World Star' Psy performed his hit song, "Gangnam Style," on the last night of 2012 at in Manhattan.

On December 31, Psy performed "Gangnam Style" in Times Square as thousands of people danced the 'horse-riding' dance.

In the middle of the performance, Yoo Jae Suk and No Hong Chul also made a surprise appearance, as they were the actual performers in the music video as well.

This show was hosted by Ryan Seacrest and many other top stars appeared on stage as well.

Psy ended his performance with MC Hammer as they danced to "Gangnam Style" together.

Psy also received a 'Happy Birthday' message from the crowds as he stated that it was his birthday.