During this week's episode of 'Fantastic Duo 2', Kim Jong Kook and Suhyun of Akdong Musician had a chance to collaborate together for the audience.

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The two sang "Addiction" together perfectly that simply touched everyone's hearts on the show. Because both singers have a similar high voice tone, they worked together extremely well without overlapping or taking each other's spotlight. The audience simply watched the performance in awe as Suhyun and Kim Jong Kook harmonized with each other effortlessly. 

Watch the fantastic performance above!