My speakers have gone spaccy.?

I used to keep my earphones lugged into my computer tower all the time, to listen to music without bothering my parents. But i accidentally snapped off the bit you plug in. It is stuck in there, and won't come out. So now i can't listen to music, or anything that makes a sound, because the computer thinks it has to play it through the headphones. The speakers work perfectly, otherwise. What should i do? :/.