Issue with iTunes

[Aves]

So I unplugged my speakers (which are connected with both and analog connector and USB port), and now I cannot listen to music on iTunes. But I can listen to stuff on YouTube still. Any idea on what I need to do?

UPDATE: All of my videos still play with audio. But not music. HELP D:

PS: It's iTunes 9

[Zero Beat]

Plug the speakers back in :P

Or...! Go to the prefenreces and look for something to do with selecting speakers. Or... Dunno :(

[Aves]

It fixed itself. Just left it alone for 2 hours and it decided to work again.