female perspective. Lee's vocal range can be classified in the mezzo-soprano range. In spite of her sexy image, she has been recognized for her emotional delivery in songs like "Swing" and "Amor Mio". Lee has been criticized for her vocal ability, which she responded with "I think everyone thinks differently, so they can think so. Before, I felt like I was hiding behind the instruments. It felt uncomfortable otherwise. But starting from a point, I started liking my voice. Since I like it, it didn't really matter what other people thought." Lee has been influenced by fellow Korean singer Uhm Jung-hwa. Image As a member of Fin K.L, Lee became known for her sex appeal. This image has allowed Lee to lend her face and image to advertising for various company endorsement deals, and in 2005 she was chosen in a consumer survey as the female entertainer with the strongest brand power. In late 2003, Lee signed an advertising contract with Samsung, for which she would make three musical commercials and songs for their Anycall cell phones, which became some of her most prominent commercials. The first commercial and song, "Anymotion", was released in early 2005, featuring Eric Mun from Shinhwa. In early 2006, the follow-up commercial "Anyclub" featuring Teddy Park from 1TYM was released in two parts; the music video starred Eric Mun and actor Kwon Sang-woo. The songs from the commercials served as singles for Lee in between her albums. The final commercial was released in December 2006, titled "Anystar" and differed from the first two in that it featured mostly dialogue. The commercial starred actor Lee Joon-gi and YG Family trainee Park Bom (2NE1). Her contract with Samsung ended in December 2007. For five years, Lee was the model for Lotte Liquor, making her its longest-serving endorser. According to Lotte, the market share of the company's soju brand rose from 11 to 15 percent while Lee modeled for it. Her contract ended in November 2012. In 2007, she starred in a commercial with Jessica Alba for South Korean cosmetics company Ĭsa Knox, which was shot in Vancouver, British Columbia, Canada. Lee also modeled for cosmetics company Biotherm (her contract ended in February 2007), and Black Bean Therapy, a health drink. She then signed with KB Card, and has starred in commercials along with Rain. She was a model for Calvin Klein Jeans, modeling for the "Pure Calvin"