Later in January, SM Entertainment confirmed the release of Oh!, the group's second full-length album to be released on January 28.[26] The lead single "Oh!", was digitally released on January 25 with the music video being released two days later.[27] The song proved to be popular topping various charts upon release.[28] On January 30, the group started promotions with the recording of MBC's Show! Music Core.[29] The broadcast of the performance experienced a blackout near the end, to which MBC made the whole performance available online in response.[30] With 'Oh!', the group went on to win 5 consecutive K-charts on KBS Music Bank, as well as achieving a triple crown on SBS Inkigayo.[31] 'Oh!' also went on to win Music Bank's half-year K-chart, coming in at 2nd on Hanteo's first half album sales chart,[32] and also winning the end-of-year K-chart.[citation needed] The music video became ranked as the number one most viewed YouTube video in Korea by the end of 2010. It was also No.1 in Hong Kong and made the top 10 in both the Taiwan and Japan rankings.