'Sexy Pop star' Katy Perry is also a fan of rapper Psy.

Today, Katy Perry wrote on her twitter, "Help, I'm in a gangnam style k hole," along with a link to the "Gangnam Style" music video.

Psy's "Gangnam Style" has been featured on CNN, WSJ, Huffington Post and other foreign TV news channels. Famous celebrities such as Robbie Williams and T-Pain have also talked about him on their twitter and blogs. 

Today, Psy's "Gangnam Style" ranked number 1 on the U.S. iTunes Music Video Chart. 2nd was Justin Bieber and 3rd was Katy Perry.

Katy Perry has also ranked number 1 in Maxim magazines 2012 Hot 100.