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Most sex tape rumors involving Britney Spears are either too good to be true (Colin Farrell!) or too gross to convince us to want to see them at all (K. Fed). But the latest story from the tabloids is filled with details so plausible (especially considering the then-manic Package's mental state) that we're not so sure it's just another fairy tale. As the National Enquirer is reporting (again, don't judge a supermarket tab's creds by its cheap cover):

[Adnan Ghalib] is shopping around a sex tape that was filmed during their trip January trip to Mexico...[the tape] will go down as the highest selling porn tape of all time, out selling even Paris Hilton's.

So what could Britney possibly do in the bedroom to top her fellow Bimbo Summit member's green-eyed appearance in nightmare-vision? The eerily realistic details after the jump.

As a source who claims to have seen the tape tells the tab, "the video starts with Britney undressing...She was wearing some cheap clothes that she bought down there. The sex wasn't particularly kinky but Britney wears a pink wig throughout." Well, the image of Britney in that pink wig she favored during her American Tragedy days doesn't do much to entice us, but we do find it highly believable that sex with Spears just wouldn't be all that "kinky." We've seen her manhandle props like umbrellas before and it was neither graceful nor hot. But the kicker comes after Spears allegedly performs a striptease for Adnan, removing all her clothes save for the technicolor bob: "Adnan tells her to take it off at one point and she says coyly, 'Take what off? There's nothing left to take off.'" And thank goodness for that. However horrific Paris appeared as a nocturnal sex nymph in her tape, nothing puts the sails down like bald sex.