【がくっぽいど】jewelfish【カバー】
Another cover of Jewelfish, but this one is deeper (And older - the cover I posted earlier is fairly new). It really depends on how you like to hear Gakupo on which one you'd like better.
Original: http://www.nicovideo.jp/watch/sm9533621
MP3: http://nicosound.anyap.info/sound/sm9...
Go down to the data box and press the blue link that says "MP3 を抽出".