Akdong Musician appeared on KBS's 'Yoo Hee Yeol's Sketchbook' on May 14!

On this day, Yoo Hee Yeol asked the siblings, "You two are siblings.  Have you ever fought before going up on stage?" and Suhyun replied, "Many times," while Chanhyuk said, "I think when we work, we have a business relationship."  Suhyun added, "When we're working, I respect oppa a lot.  Because he's the producer."

SEE ALSO: This female celebrity becomes first to win Daesang as both a singer and an actor

When asked about Suhyun's improved vocals, she said, "I'm the type who reads a lot of comments, and one of them said I was just lucky for having a good tone.  After reading that, I practiced a lot."

And you sound even more wonderful than you already did!

Chanhyuk also said he is more confident in his dancing than singing, you can check out their dancing to 2NE1's "I am the Best" below!