Most Helpful Girl
I dont know about websites, but frostwire is a really good app0
Most Helpful Guy
or just go to a youtube mp3 downloader.0
I like 7 digital.
Spotify, is a good app, but I am not sure about websites.
I just go straight to youtube, copy the link and post it to YouTube to mp3 and download it from there.
Junglevibes and aiomp3