A picture of Psy and Redfoo was taken inside a club.
Psy uploaded a picture on Sunday, of himself with LMFAO's member, Redfoo, on his Twitter.
Redfoo had his arm around Psy's shoulder and Psy was seen with a frowning and strange face.
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Redfoo and Skyblu has been gaining a great deal of popularity, after their debut in 2009. They are also known for the addicting melody and their shuffle dance.
Internet users commented, "I can't believe Psy and Redfoo too a picture together. I'm nervous," "Psy became friends with LMFAO? That's awesome," "I like the club picture."