Singer Doctor Lee shows his jealousy of Psy's popularity with "Gangnam Style."

Doctor Lee commented, "If only there was YouTube during my time," talking about Psy's soaring popularity online.

12 years ago, Doctor Lee came out with a new style of music and had many hit songs. He was known as the 'Psy' of his time.

Doctor Lee plans to comeback with a mini album on August 23.