Following their huge success with Super Show 3, Super Junior recently made a surprise announcement that they would be officially releasing a trot single entitled, Knocking. Their new single was revealed on the 16th through various music websites such as MelOn, Cyworld, and more. The members had sang Knocking at Super Show 3, and they received an overwhelming response to the song due to its catchy lyrics and fun melody. As a result, it was decided to make it an official release for fans. Meanwhile, Super Junior will be returning to the Seoul Olympic Stadium to perform at the first stop for the� SM TOWN LIVE '10 event on the 21st.