After the release of their leather-clad teaser photos and hot audio for their follow-up track, "Mach," the seven sexy women of Rainbow are ready to bring some heavy duty competition back to the K-pop scene, starting with M! Countdown on October 21st. With the drastic transformation that came with their follow-up promotions, these ladies have definitely grown plenty since we've last seen them shed their colors on the stage. What do you guys think of their new dominatrix image?