She been revealed that rookie group SPICA a singer Kim Boa used to be Infinite vocal trainer. A representative of B2M Entertainment confirmed that Kim Boa has trained members infinte in the past. Since their inception, SPICA surprised the audience with their loud voice. Unlike many other groups of girls, all members have strong voices with their distinct colors. The fact that Kim Boa used to be a vocal coach shows his singing ability and talent. As this news was released, users have found and downloaded a file from Kim Boa before his debut as SPICA and Infinite Kim Sung Gyu sing a duet on “ Lucky ” passionate fans. Apart from vocal coach, she has worked with Sweet Tune , who wrote the most hit songs INFINITE as guide vocalist / song Director. Meanwhile, SPICA released their debut track clip « strongly ” Jan. 9. Their clip has its famous labelmate Lee Hyori .