Sometimes I cann't understant words or phrases when I am listening my favourite playlist. That is beacuse I am still studying this language, english. (I forgot to say that I am spanish speaker) I am in Low advanced level, so I have to learn a lot!
Well, almost all the time I am trying to practice my english by listening to music and helping myself reading music's lyrics... belive me, It works!
My prefered website to find a lot of lyrics is this: http://www.azlyrics.com
Just look your favourite Artist or group by Letters, and then look for Album's year or Title. Then You will able to Listen to music while your eyes follow the song. i.e You will listen by using your eyes! :P