Idol group MBLAQ made a surprise appearance on an episode of 'Voice Korea'.

On the March 23rd airing of 'Voice Korea', the 48 contestants that made it through the blind auditions prepared for the battle rounds, hoping to move on to the next round.

The episode revealed a clip of the MBLAQ members who were watching 'Voice Korea' backstage at 'M! Countdown'.

Though the boys continuously juggle quite a busy schedule, they took the time to watch the program in between performances.

As Huh Gak's brother Huh Gong stepped into the ring to battle his opponent, the members remarked, "Look it's Huh Gong hyung. He really looks identical to Huh Gak." They also proved they were avid fans of the program by personally introducing Huh Gong's opponent to the viewers.

'Voice Korea' is a blind vocal audition program where the contestants are judged based not on their looks or background, but on vocal talent alone.

The show is garnering high interest as there are quite a number of talented hopefuls who have made it through.