It's been about 12 hours since we learned the tragic, devastating news of Paris Hilton's shocking breakup with boyfriend du jour Doug Reinhardt.

Now that the dust is settling, the tears have stopped flowing, and we are able to keep food down again, we're looking into what led to the split.

Well, according to reports, Paris Hilton and Doug Reinhardt got into a big fight at The Darkroom in L.A. on Tuesday night, which was the final straw.

The nuclear blowout ended with Paris giving her man, who pr...

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