In 2009, she returned to Japan, making her solo debut as Iconiq under Avex's label Rhythm Zone. Her first activities under Avex were for Shiseido's Maquillage cosmetics line, where her song "I'm Lovin' You" (a duet with Exile vocalist Atsushi) was used in commercials and Lee's image used in billboards for the promotion of the line.[8][9][10] Iconiq was marketed around her buzz cut hair-style.[9][11][12]