US TOP 100 SONGS app allows its users to view hot 100 chart available on billboard.com ,on their android devices. Plus user can also listen to preview clips provided by 7digital.com If user wishes he/she can also buy track(s) from 7digital.com provided the track is available for selling purpose in user's geographical territory
BillBoard.com : For Tracks name and Artists name of music chart
7digital.com: For providing the Image,Preview ,Buy Link corresponding to track and artists
Graphicsfuel.com : For App Icon and Forward , Backward & No preview Available icons
Yellowicon.com : For media player control icons
NOTE: THIS IS NOT AN OFFICIAL BILLBOARD APP.