Psy's "Gangnam Style" has been included in the U.S. drama "GLEE" OST.

Today, the U.S. drama "Glee" OST album was released and Psy's "Gangnam Style" was included in the album.

Psy's global popularity could be seen as the drama featured his song in an episode.

With his appearance on the show, his popularity increased even more.

The producer of "Glee" also revealed that he is a huge fan of Psy.

"Glee" started in 2009 and is on its 4th season.