Thank you sooo much to the people who said whatsapp was the problem! I was distressed without my music! I should have realised as when I rebooted my phone a message would pop up saying 'un caught exception, something something whatsapp'! I knew something was wrong with what'sapp due to it having to reload its self! I'm gonna make a formal complaint!
Thank you very much, I deleted most of my applications and re-booted severally but is still says the same until I deleted my whatsapp. And they say whatsapp is the best mobile messenger and it is doin this **bleep**. It is just painfull that most of my friends use whatsapp. Thank you very much