Music randomly starting on my s3.

This morning at 5:30, I was awoken to its my life blaring out of my phone. Problem is, no apps were running, no notifications, no alarm going off.

It's not set as a ringtone or notification or anything like that.

Any ideas why it would do that?

I've had the phone 6months and ita never done this before.

I'm running 4.1.2 and have winamp and the stock music player installed.