Jailbroken iPhone 4s won't sync?

So, I plugged in my iPhone (wanting to add some music, photos, etc.obviously) and it goes through the whole process of syncing besides the end.

It's in an endless loop of 'waiting for changes to be applied'.

I literally let it sit there like that for 30+ minutes and nothing happened - nothing went onto my iPhone.

What do I do! I need new music desperately.

Restore and try again.
you warranty is already void so you have nothing to lose.