Kristina Shannon and Karissa Shannon are pictured here. Which is which? Seriously, folks, does it matter?
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Kristina and Karissa Shannon turn 21. What a couple of stunners ... not.
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Karissa and Kristina Shannon celebrate their 21st birthdays. We have no clue which is which either.
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They're sisters! That makes this kind of gross, but we dig!
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Yup? Still there. Good thing you checked the ladies' status in front of us, Karissa Shannon!
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Karissa and Kristina Shannon have both seen Hugh Hefner naked. We're as grossed out by that fact as anyone.
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We didn't expect The Shannon Twins to show up at the Paper Magazine and H&M Fashion Against AIDS Collection event. But this is a shot of Karissa and Kristina.
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This would be a lot cuter if Hugh Hefner was the grandfather of the Shannon Twins. Instead, he's their lover.
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Crystal Harris and The Shannon Twins tag team Hugh Hefner. That would be an awesome thing to imagine, except for the obvious weirdness.
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The Shannon Twins, along with Crystal Harris, are the new Girls Next Door. They'll star in a new season of the E! reality show.
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Hugh Hefner, Crystal Harris and the Shannon Twins sit and watch the action as Kendra Wilkinson marries Hank Baskett at the Playboy Mansion. Hilarious stuff.
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Here's a shocking development: Karissa and Kristina Shannon pose in the July/August 2009 issue of Playboy. Somehow, they are not naked.
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The Shannon Twins Biography

The Shannon Twins Nude
The Shannon Twins are dating Hugh Hefner. Their individual names are Karissa and Kristina Shannon, but does anyone really care? The... More »
Full Name
The Shannon Twins