Yui, stylized as YUI or yui, is a Japanese singer-songwriter and multi-instrumentalist. In her solo career, she sold more than 5 million physical copies in Japan. She is popular in Japan and in surrounding countries, ranking number one in 2011 Count Down TV "Dearest Female Artist" and Music Station "Artist You Most Want to Marry" polls, as well as Radio Television Hong Kong's "Most Popular Japanese Artist".

Count Down TV is a Japanese late-night music television program, broadcast on TBS since 1993. The program is shown weekly, and features a Japanese music video hit chart countdown, live performances from musicians and music information. It is presented by three CGI-animated hosts.