Idol stars G.O of MBLAQ, Hyorin of SISTAR, and INFINITE's Sungkyu, recently stood on the stage of KBS's 'Yoo Hee Yeol's Sketchbook',�where they sang solo covers of various veteran artist tracks. With Yoo Hee Yeol himself directly being their piano accompanist, G.O performed Kim Gun Mo's "Lingering Affection", while Hyorin sang Park Hye Kyung's "Confession", and Sung Kyu covered "One Late Night in 1994" by Jang Hye Jin. Check out the performances down below! Source: BNT News via Nate