Google Chrome starts playing when booted?

When I boot up Google chrome, it starts playing music!? This is so crazy. I believe its some radiostation, its not a tab or so. Very very crazy.

When I look in my activity monitor, there are 2 proccesses wich are red, Pepper flash player, and google chrome renderer. Ther also is an extension core audio cd. Seems legit..

I can't remeber that I downloaded a extension or so..

When I quit the pepper flash player, it stops playing..

When I turn wifi off, it stops, when I turn it back on, it starts again.

So very annoying.

What to do?

Giorgio