The first Kanye West sex tape we heard about supposedly co-stars a Kim Kardashian look-alike.  But now, some websites are saying it's actually Kim.

The conspiracy theory goes like this:  At the time the tape was made, Kim was actually CHEATING on her husband Kris Humphries with Kanye. 

Now that the tape is out, Kim has to cover her backside...because any evidence that she cheated could be financially devastating to her in the divorce.

So what they did was, they paid an aspiring model named Mony Monn...who does kind of look like Kim...to claim she's the woman in the tape.

They gave her six figures...as well as some pictures of Kim to mix in with her own photos on Facebook to confuse people even further.

Check out the look-alike!  It's looks just like Kim K! 

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