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.