I have been using wynk music app for quite some time and it certainly has great collection of all kinds songs hindi, english, regional etc. The app is very fast and loads music very fast. The songs can be shared easily on sites like facebook, whatsapp.
If installed on airtel network it gives unlimited download offer, otherwise one can listen the song without any cost. The data consumption of listening the song is same as downloading i.e. approx 5mb per song, for using this app on mobile data this can be a problem. App also remembers the previously listened songs in favourits.