It was revealed that the main actress in Mighty Mouth's 'Tok Tok' music video teaser, Lee Joo Bin, was in fact an ex-member of girl group Rainbow. Released on January 16th, the music video teaser captured the attention of viewers with Lee Joo Bin's western look and cute eye-smiles. It was only later revealed that Lee Joo Bin spent her trainee life preparing to debut as a member of Rainbow, however she was withdrawn shortly before their debut. In addition to Mighty Mouth's music video feature, Lee Joo Bin was also the main cast for a song in SS501's 3rd album called "A Song Calling For You" back in 2008. Meanwhile, Mighty Mouth's full second album, "Mighty Fresh", is set for release this coming January 18th, with Kim Jong Kook's niece Soya to feature in one of the album's tracks. Source: Newsen via Nate