Cube Entertainment announced the creation of 4Minute May 2009, together with the identity of two of the group members, Nam JiHyun, group leader and HyunA Kim, a former member of Wonder Girls. On June 11, 2009, the silhouette teaser video was released online, along with their official website. The remaining three members' identities were not announced until June 12.
Cube Entertainment have released a teaser for its first "Hot Issue" single on June 10, while the single debuted on June 18. The group promoted the music of its release until August. In late August, 4Minute released a mini album called "For Muzik", which was next to his second single, "Muzik". 4Minute won a prize and a prize for the Mnet Mutizen second single "Muzik". His third single "What A Girl Wants" was released shortly after the release of their EP.