Karissa Shannon: Sex Tape Partner of Heidi Montag, Playboy Model, Former Hugh Hefner Plaything

Almost lost in the shuffle of the Heidi Montag sex tape drama is the fact that there's allegedly a separate video of girl-on-girl action with Karissa Shannon.
Remember Karissa? One of Hugh Hefner's twins? Here's the rundown:
At some point, the original Girls Next Door split and the Playboy founder replaced them with Crystal Harris and the Shannon Twins, Karissa and Kristina.
At some point, Karissa Shannon linked up with Heidi Montag and filmed a girl-on-girl sex tape. It's unclear if Kristina also took part, but the tape exists.
So Karissa says, although she's skeptical Spencer Pratt has the thing.

Even beyond from the fact that she stars in a girl-on-girl sex romp with The Hills star - deemed less valuable than her with Spencer Pratt, oddly enough - Karissa is kind of a shady individual, having lived quite the checkered life by age 20.
In 2007, Karissa and Kristina Shannon were charged with aggravated assault and placed on probation ... on the heels of a previous battery arrest no less.
Karissa, one of Playboy's July and August 2009 centerfolds with her sister, is also dating actor Sam Jones III, who was snared in a DEA drug raid last year.
The Twins were reportedly kicked out of the mansion in January.
She recently told SheKnows of her career plans: "I have a lot of goals. I want to be very successful when I get older. I never wanted to be a school teacher or something small, I wanted to be something that people could look up to."
 hollywoodgossip