跪求justin bieber- baby既數字笛譜 20點

I suggest your visiting of the following websites.

1) 管樂星球 -- 樂譜下載天地
http://gogomusic.com.tw/

2) 魚蛋村音樂區
http://www.yudans.net/main/

3) 蟲蟲
http://www.gangqinpu.com/

4) 香港流行音樂聯盟
http://www.hkchord.com/guitar/

5) SOUPU搜譜網
http://www.soupu.org/

6) 流行曲的笛譜
http://www.rupert-music.com/wp/

7) 中樂譜交流天地
http://mayasun.idv.tw/default.asp

8) 香港流行鋼琴協會
http://www.poppiano.org/

9) 鋼琴曲譜下載
http://www.popiano.org/big5/piano/

10) 小新的吉他館
http://www.gita.idv.tw/

11) 結他友
http://www.guitaryou.com/guitaryouplus/index.php

12) 結他友2
http://guitaryou2.com/

These are lots of useful materials for your reference and I am sure you can find what you desired for. Please focus on the first several websites for they have more general materials and catered more for your needs this time. The others are provided for your future use whenever you want to search some relevant free of charge materials in the future.
Hope I can help you.