Psy seems to be just adding onto his growing collection of photos taken with celebrities, because he just uploaded one more to the mix. On December 13th, Psy shared a photo taken with American comedian Conan O'Brien.

In the photo, Psy is in a red stage getup and is standing beside the tall comedian. Conan O'Brien is known to be 6'4", so he towered over Psy who is 5'7". Psy recognized this fact in his tweet when he wrote,

along with @conanobrien...nice guy and tall. lol twitter.com/psy_oppa/statu�

� PSY (@psy_oppa) December 13, 2012

The outfit looks like Psy's outfit from the 'Christmas in Washington 2012' concert, where both Psy and Conan O'Brien attended.

Source: Psy's Twitter