2PM's Nickhun offered a formal apology to viewers of 'Radio Star' during the show which all members of 2PM took the seat as guests.

About his drunk driving incident last year that caused a huge wave of controversy, Nikhun apologized and provided further explanation surrounding the event.

"I have learned so much from the bad mistake I made. What happened was that I just left without letting anyone know. No one at the team dinner would have allowed me to drive home drunk. I was dumb for doing that. I was just really tired and wanted to get home," Nikhun said after solemnly bowing at the camera.

Nikhun added, "I was really thankful to my members. These guys are so loyal. Our management company wanted to continue our schedule without me but the guys decided against it."

In closing, Nikhun promised, "I apologize once again to all the fans who were disappointed in me. I am sorry. I will never let this happen again."