Before using the program you'll have to register and create an account. From then on, you'll be abe to search, find and listen to millions of songs.
You onl have to eter the name of the song or artist and you'll see the list of results, then, choose whether to listen to it or download it.
Not only will you be able to listen to audio tracks but you'll also be abe to listen to radio stations and record what they broadcast.
Nexus Radio is a full featured program that offers good results and lots of options.