Having collaborated with MBLAQ and TEEN TOP in the past fortnight for their "Shy Boy" stages, the SECRET girls are turning their attention toward another idol boy group! Ahead of their concluding promotions this weekend, the girls linked up with idol boy group�INFINITE for a special performance of SECRET's hit song, "Shy Boy", on today's Music Bank. So check out their special stage below! The INFINITE boys also performed a dance break mix of their song, "BTD." Sadly for fans of both groups, this was their final week of promotions.