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Music Bank is one of the most anticipated music show which showcase performances of idols such as SNSD, Shinee, Super Junior, T-ara, Teen top, IU, G.NA and other idols. Last June 14, 2012, Music Bank had a live broadcast, audience anticipated the performance to be showcased by their favorite idols but what shocked them was a performance from 5 girls each wearing masks hindering others to know their identity, the 5 girls sang and danced perfectly which awed the audience. The netizen's upon watching the video on social networking sites made a conclusion that it must be some members of SOS, the new girl group SM Entertainment would debut.Haven't watched the video? Check this out and see for yourself their talents!