Best Film Soundtrack/Theme

I don't know if we've had one of these, and I can't be bothered looking. If we have then it's too old to have registered on my radar, so it can go Mexican itself.

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Anywho...

In your opinion, which films have the best soundtrack?

Watchmen has one of the best songs-from-the-period-soundtrack, I think, and (the original) Pirates of the Caribbean has a pretty epic composed soundtrack. I'm listening to it now, and I have to say I'd forgotten how good it actually was!