Since Fin.K.L's disbandment, 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.