Sexy sub-unit Rainbow BLAXX finally released the MV for their song "Cha Cha" just the other day.  However, member Woori made more hearts stop by unveiling a sexy new selca that's been attracting attention of late.

She wrote, "All the teasers for Rainbow BLAXX have been released.  However, this is just the beginning~  Thanks for all the interest and love.  It is cold, fans, so be careful of getting sick."

SEE ALSO: Rainbow BLAXX wants to 'Cha Cha' with you in their unit release!

In the picture, Woori is decked out in her stage outfit, which shows off her glamorous figure, and wearing smoky eye make-up for a sexy and mature look.  How are you liking the sub-unit's debut so far?