A photo of Psy from 2 years ago has been revealed online.

On a recent online community board, a post with the title, 'World Star Rain's Lecture' along with a picture was revealed. This picture was from 2010 from SBS "Best Friend Note 3."

Rain and Psy revealed that they have known each other for 10 years and that they met through Park Jin Young. In this episode, Rain gives Psy advice on how to be a world star.

Rain stated, "Keeping a good body and keeping fit is necessary and instead of singing a hundred or a thousand songs, it's good to rip your clothes once!"

While Rain is talking, Psy's expression caught the attention of many. His serious face as he listens to Rain is funny as he is now a world star 2 years later.

Internet users commented, "Psy's facial expression is so funny" and "Rain will be proud of Psy when he comes back from the army."