New boys groups ZE:A and C.N. Blue already made their debut on Music Bank and Music Core!

The boys performed their debut song "Mazeltov" and "Alone" respectively on today's show.ZE:A,known as the male version of SNSD,already feeling the pressure although they have just debuted.

On the other hand,C.N. Blue started to feel the pressure as people are comparing them with F.T Island.I have to say that it is not easy to survive as a k pop group,if you are not group enough,you will be eliminated!

Watch their debut performances here!