Rookie idol group MYNAME jumped into the music scene through their debut performance on 'M! Countdown' tonight. The group, who used to be known as Hwanhee's Boys, has a total of 5 members. The members consist of Seyong, Insoo, JoonQ, Chaejin, and Gunwoo, whose birth years range from 1995 to 1988. Unfortunately, their mentor Hwanhee was unable to cheer them on in person, as he had enlisted in the military earlier this afternoon. Still, the boys are mustering up their courage to deliver an impressive debut. H2 Media stated, "A spectacular performance and song has been prepared that incorporates the strengths and charms unique to MYNAME. As the debut date approaches, the members have been practicing hard� They aim to become the most anticipated rookie group of 2011." Check out their debut performance below!