On the December 21 episode of tvN's 'Livin' the Double Life', CL went hiking and while walking up the trail, she revealed, "Yesterday was Oh Hyuk's birthday. I sent him a text but this punk had no response." She then playfully yelled at him, saying, "Are you crazy? You crazy? Reply to me! I congratulated you but how could be so rude and not respond to me?"
She then sent a video message to Oh Hyuk, who would be watching the footage in the studio. CL said, "Happy birthday, Oh Hyuk, and I was really shocked that you didn't reply. You crazy? I'll see you in Korea. You're dead."
Oh Hyuk from the studio came up with an excuse, and explained, "It was because of the time difference..."