Girl group Rainbow's unit Rainbow BLAXX held a breathtaking sexy battle.

The January 29th broadcast of MBC Every1's "Weekly Idol" featured Rainbow BLAXX, who is currently promoting their new song "ChaCha." They happily showed off their sexiness in all different ways. The girls brought their bold sexiness and held a sexy dance battle. As much as they have come back with a 19 and over sexy concept, the members showed off their sexy charm that was never before seen.

Regarding their current sexy concept Rainbow BLAXX commented, "It's currently the best of the existing idols." And as if to prove that, the music came on, and Jaekyung showed off her sexy dance, which was unlike anything she'd shown before.

MC Jung Hyun Don and Defconn both jumped up from their seats and gave a thumbs up of approval. Their exaggerated reactions caused everyone to double over in laughter.