With SISTAR's successful sub-unit SISTAR19's comeback just around the corner, Hyorin updated fans with a selca of her new black hairstyle.

Starship Entertainment shared on their official Twitter on the 25th, "SISTAR19 (Hyorin & Bora) who are anticipating their comeback on January 31st unveiled an image beforehand! Following 'Ma Boy' what kind of image will they show next?! We ask for your love and support! :D SIST?R19 -> 2013.01.31.", along with a set of photos showing Hyorin donning a white sweater dress and surprising fans with her new black hairstyle.

It has also been revealed that hit making producer Brave Brothers teamed up with SISTAR19 once again to produce their upcoming single. Especially with the debut of many sub-units recently, most notably INFINITE H and 2YOON, fans have become even more excited for SISTAR19's comeback.

Netizens commented, "Transformation into 'Black [hair]' Hyorin", "Hyorin's figure is glamorous", and "I've been waiting for SISTAR19's comeback."

Stay tuned for SISTAR19's new album to be released on the 31st!

Source: Starship Entertainment Twitter