moved back to S.M. Entertainment and became a member of Girls' Generation. In July 2007, Girls' Generation had their first stage performance on Mnet's School of Rock, where the group performed their first single, "Into the New World" (). On August 5, 2007, the group officially made their debut on SBS's Inkigayo, where they performed the same song. Girls' Generation subsequently released their self-titled debut studio album in November 2007, which was preceded by the singles "Girls' Generation" ()—a remake of Lee Seung-cheol's 1989 song, and "Kissing You". Girls' Generation became the twelfth best-selling album of 2007 in South Korea, selling 56,804 copies. The album has sold over 120,000 copies in the country as of 2009. In March 2008, the album was re-released under the title Baby Baby. The album was preceded by a single with the same name, which was released on digital music sites on March 17, 2008. 2009–2010: Breakthrough and Japanese debut Though Girls' Generation had gained some attention with their 2007 debut album, it was not until 2009 that the group rose to stardom. On January 7, the group released their debut extended play (EP) Gee, which has sold over 100,000 copies in South Korea. Its title track claimed the number-one position on KBS's Music Bank for a record-breaking nine consecutive weeks, becoming the longest-running number-one song on Music Bank until 2012, when Psy's "Gangnam Style" claimed the top spot for ten consecutive weeks. It was the best-selling single of 2009 in South Korea. The group's second EP, Tell Me Your Wish (Genie) () and its titular lead single were released in June 2009. The EP sold 50,000 copies within its first week in South Korea, and charted at number eight on the Taiwanese G-Music chart. In November 2009, S.M. Entertainment announced the group's first concert tour, Into The New World, whose tickets for the South Korean shows were sold out in three minutes. The tour visited Seoul in December 2009, Shanghai in April 2010, and Taipei in October 2010. Girls' Generation's second studio album, Oh!, was released in January 2010. The album peaked atop South Korea's Gaon Album Chart and has sold over 234,500 copies in South Korea as of 2014. The album's title track peaked atop South Korea's Gaon Digital Chart and was the second best-selling digital single of 2010 in the country, selling over 3.3 million copies. Oh! was re-released under the title