In June, it was announced that G.O would replace B2ST's Yoseob in Immortal Songs 2, staying as a cast member for at least a month with new cast members including F.T Island's Hongki, 2PM's Junsu and Secret's Ji Eun.
Pada bulan Juni, diumumkan bahwa G.O akan menggantikan B2ST Yoseob di Immortal Song 2, tinggal sebagai anggota kasting selama setidaknya satu bulan dengan pemeran baru termasuk F.T. Island Hongki, 2PM Junsu dan Secret Ji Eun.