In 2004, her song BYE BYE was covered by the English singer Jennifer Ellison as "Bye Bye Boy", and Swedish girl group Play as "Girls Can Too".
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Her first music release while working on this album is as part of a limited unit called "Crimson-FANG" for the soundtrack of Kamen Rider Kiva: King of the Castle in the Demon World, having performed on the soundtrack on Kamen Rider Blade in 2004.