Psy posted a photo with the world class diva, Beyonce.

On May 7, Psy tweeted, "Finally talked to Beyonce about 'Single Ladies'" and posted a photo of them together.

In the photo are the two world stars in attendance at 2013 Met Gala red carpet event. As if they had long been friends, Psy and Beyonce struck a natural, friendly pose side by side with bright smiles on their faces.

Internet users have responded, "Wonder what he talked to Beyonce about?" "Not even surprised by all the world stars Psy meets anymore," "What about 'Single Ladies'?"

Meanwhile, Psy will give a lecture at the most prestigious school in the Unites States, Harvard University, on May 9 about the meaning of K-pop and its relationship with the Korean culture.