What is this music website called?

I used to go on this site all the time but then i forgot about it but
now i remember it again but i dont remember what its called. On it you
could listen to the top 100 radio songs and they would shuflfle them
all. You could also create your own playlist.
You could also say if you wanted the site to play songs that werent on
your playlist but songs that were like the songs in your playlist that
they think you might like. Does anyone know what this music website is
called???