After almost two years of inactivity, sub-unit Sistar19 are to make their long-awaited comeback.
The duo, comprised of SISTAR's Hyorin and Bora, will make their chart return in January, a spokesperson for Starship Entertainment confirms to IdolWow!.
Popular producers Brave Brothers have been roped in for the pop track.
Sistar19 debuted in May 2011 with 'Ma Boy' and spent several weeks in the charts until they XXXXX two months later.
Hyorin, 21, said of working with Bora, 22: "We have a great balance and are both hard working. It's strange without the other girls, but I love working with her."
It will be a busy start to 2013 for Starship Entertainment, who are also planning to debut a male group with at least 10 members.
Little is known about the new act, who Korean media have already dubbed as the "male Sistar", but a source reveals: "They're young, very tall, charming and masculine."