http://clothing-and-accessories.become.com/mp3-top-40?kd=7627514&tc=2

http://www.mp3-network.net/

http://www.get-music.net/chart/uk-top-40.html

http://www.get-music.net/chart/us-top-40.html

http://www.fast-mp3.com/charts/top40

http://mp3-world.us/top-40-id23-startpage1

http://www.mp3-network.net/charts/top40.html

http://www.mp3nova.org/top-40/

http://www.jcomusic.com/top-40-genre-23/1.html

http://www.mp3.com/charts/topchart.html

http://mp3-world.us/top-40-id23-startpage2

http://bitshifter.cc/genre/top-40/23/1.html