Man, a lot of my favs have already been posted like Perfume, Britney, alan, and Ayu of course. Even KOTOKO (BLAZE cover is like one of all time favorites along with the song.
). There's a lot of cool/beautiful/awesome covers here though, there's very few I'd call bad/ugly. They're enough to make me wanna check out the albums they belong to, hehe.
Some of my favs that haven't been posted: