G-Dragon formed a duo with rapper T.O.P.
G-Dragon . G-Dragon later formed a duo with fellow Big Bang member T.O.P to record and release the album GD & TOP ( 2010 ) , which contained the top-five hits `` High High '' , `` Oh Yeah '' , and `` Knock Out '' on the Gaon Digital Chart , while the album peaked at number-one . Choi Seung-hyun ( ; born November 4 , 1987 ) , better known by his stage name T.O.P , is a South Korean rapper , singer-songwriter , actor , and record producer .