Many fans were attracted to the name of former Wonder Girl, Hyun Ah appearing on the cover of AJ's debut single album. Earlier, Hyun Ah had appeared fleetingly in the teaser for AJ's Dancing Shoes but it had already created a long of interest even then. AJ's new hip-hop song, 2009 from his debut single was released today over the internet and features the vocals and rapping talent of Kim Hyun Ah. According to someone from Cube Entertainment (subsidary of JYP Entertainment), "Former Wonder Girls Hyun Ah participated in the recording of AJ's new song with her newly matured vocals since her Wonder Girls' days. This is a gift to her fans who have been waiting patiently for her comeback all this while. At the same time, this is a signal to everyone that her comeback is impending." AJ's debut single album First Episode A New Hero will be released offline on 2nd April. 25 second teaser (HyunA rap, cute reference to the Wonder Girls). Long teaser (credit to peenkranger). Looks like the heat is turning up with many debuts in the coming weeks.