 During the mid-2000s, Lee was one of South Korea's best-selling singers, selling more than 700,000 albums in 2004 alone despite a recession in the music industry.In 2001, she sang the official Korean version of the "Final Fantasy X" song “Suteki Da Ne” in Korean, titled “얼마나 좋을까” (“Eolmana Joheulkka”).She released her seventh album, "Grace", on January 21, 2006.