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Yang Hyun Suk congratulated the two of them on his Instagram, "HAPPY BIRTHDAY TO PSY & ME", and shared a friendly snapshot of them with their birthday cake. G-Dragon also tweeted, "Happy birthday CEO ???????", and left fans smiling with an old YG family photo.

Yang Hyun Suk's birthday is on December 2 but by the lunar calendar, he celebrates his birthday this year on January 2. Psy also ended 2013 with his birthday on December 31. The close friends are also working together for Psy's upcoming comeback which is rumored to towards at the end of January.

Happy birthday, Yang Hyun Suk and Psy!