On the January 20 installment of 'Knowing Brothers',�Lee Sang Yup�impressed the cast with his great impersonations of Lee Sang Min, Jung Woo Sung, and more.

During the early part of the show, Lee Sang Yup expressed how much he wanted to meet Super Junior's Heechul because he too, is very good at impersonations. With the suggestion from the cast, the two stars got into an impersonation battle where they tried to copy voices from several celebrities. The two even challenged 'Knowing Brothers' cast member Lee Sang Min in a 'Hidden Singer' style. Check out both video clip below!

How do you think Lee Sang Yup did?

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