Kim Hyung-jun
After a month and a half of Park Jung-min's debut release, Kim Hyung-jun officially released his debut solo mini album entitled "My Girl" on 8 March 2011. He also released the music videos for his lead tracks "oH aH!" and "Girl" at the same time. The album topped various music charts immediately, both in real-time and daily charts. It also received predominately favorable reviews besides its commercial success. Music critic No Jun-young (노준영) commented: "The album is worth it for those who expected it... [Kim Hyung-jun] will be a greater solo artist one day with a little more effort," while another agency stated: "The album showcases a new style different from SS501 days... the public gave a greater response than is expected."