On October 17, Psy and Justin Bieber exchanged interesting tweets with each other, showing their quickly developing friendship.

Bieber first wrote on his Twitter, without any intended address, “heyyyy sexy laaady.” It was obviously taken out of the lyrics of Psy’s “Gangnam Style,” and Psy soon responded to the teen singer, saying, “op op op.” Shortly after, Bieber retweeted Psy’s message, which is of course also part of the “Gangnam Style” lyrics.

As reported earlier, Psy and Bieber have become close friends after Psy was approached by Bieber’s agent, Scooter Braun. Psy has also signed a contract with Island Records, the agency run by Braun himself.

Source: Twitter