M.I.B perform 'Worry About Yourself First' with BESTie Hyeyeon

BESTie's Hyeyeon performs with M.I.B on M! Countdown aired on 19th November.

A Pink's Bomi has promoted with the members of M.I.B for 2 weeks and now Hyeyeon replaces her in the live performance.

What do you think of her performance?