Singers were employed by K-pop Star 2.
Lee Min-Ho ( born May 10 , 1982 ) , better known as Boom ( Hangul : 붐 ) , is a South Korean rapper , singer , actor , radio host , and television presenter . K-pop Star 2 . Yoon Do-hyun returned as host and narrator , and Boom returned as live host . Park Jin-young ( born December 13 , 1971 ) , better known by his stage name J. Y. Park or JYP , is a South Korean singer-songwriter , record producer , reality television judge and record executive . Yoon Do-hyun ( born February 3 , 1972 ) is a South Korean hard rock/folk rock singer , musician , and songwriter .