My amplifier went kablooey!

We're in the middle of rehearsal last night, and I noticed that my bass amp is sounding strange. Thin, tinny, not it's normal big bass-y self. After we finish running through the set it's crackling and popping and making some very suspicious noises so I put it down for a bit. A few minutes later I go back and hit a note and... nothing! Not a single sound comes out! So now I have a huge show tomorrow night and no amplifier. This is not good. Looks like we'll be hitting the guitar stores tonight. Oh boy, fun. *sigh*