Kanye West Sex Tape with Kim Kardashian Look-A-Like?

Is Kanye West "a superstar all from a home movie" just like his girlfriend Kim Kardashian?

Allegedly, West didn't just watch Kardashian's sex tape to get in the mood, but had a romp with a Kardashian look-a-like ... AND videotaped the romp.

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The sex tape is almost 20 minutes long and appeared to be shot in a hotel room with an unidentified female who stated she was 18 years old. The woman also confessed that she was married, but said, "My husband and I don't have sex anymore... that's why I'm here!" 

RadarOnline watched the complete video, and said, "With her bodacious curves, dusky skin and long black hair the woman is a definite dead ringer for Kim Kardashian."

West and the mystery woman never kiss, but West does wear a condom throughout the act. 

It appeared that West set up the camera and at the end of the tape he looked directly into it before turning it off.

A San Fernando sex industry insider told RadarOnline, the tape was shot shortly before "Kimye" became official. 

But even though West is not known for being shy, he is supposedly scared the tape will leak.  

"The sex tape is being shopped right now and there's a lot of interest, but Kanye is freaking out!" the insider said. "He doesn't want this tape out and will do anything to make sure it stays private."

According to the insider, West's tape will be in high demand. 

"If this were to hit the market it would be worth a fortune... there would definitely be a lot of people wanting to see this! In my expert opinion Kanye's performance far outweighs Kim's!"

Even though West is enthusiastic about Kardashian's sex tape -- in his song "Clique" he raps, "Eat breakfast at Gucci. My girl a superstar all from a home movie" -- the source couldn't say the same about West: "Kanye was practically in tears when he heard the tape was being shopped." 

Click here to see a snapshot from West's sex tape.