Playboy Playmate Karissa Shannon -- the star of an alleged girl-on-girl sex tape with Heidi Montag -- showed off the goods in Vegas this weekend ... during a quasi-naked sunbathing session. 
As we previously reported, Karissa doesn't deny that a tape exists ... but she's not convinced that Spencer Pratt is actually in possession of it.
Heidi's Alleged Sex Tape Partner -- Naked Sunbather
8/23/2010 9:00 AM PDT BY TMZ STAFF
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fredsdead
That purple towel is going to be totally ruined when she pours bleach on it. Bleach is the king of germ killers!
MikeP
I hate to say that now i want to see this video.
But I wont spend any money on it, as I'm sure It will be on every torrent site, the day it comes out.
iamsuperdan
Heidi and this chick in a sex tape?! I'm intrigued. Yowsers.
It's like I've always said: I support gay marriage, as long as both chicks are hot.
john
Nice cottage cheese thighs. She needs to do more running and less laying on her back.
vicki
Please stop with these stupid people.... I don't care ine bit for them!!!!!
BIRDMAMA
TRASH
haha
Uh. A better title would be "Chick Who Gets Paid To Take Off Her Clothes, Took Off Her Clothes"
Craig
Does Maytag come with a warranty? If you through water on her will she melt?
Ginger
Trash! These people are disgusting.
MIDNIGHT TOKER
she reminds me of my ex-wife
Race care nut
More white trash from Hollyweird. Useless, self indulgent parasites.
awards
Looks like Heidi and this chick got similar cabooses. Please show us the meat flaps!
passin thru
she looks like ANNA NICOLE SMITH
Robert
She is doable though wonder if it would be making it with a love doll?
joan
Montag a slut woman barley noticeable, Gentleman we can rebuild her, we have the technology, we have the capability to make the first plastic woman; Montag will be that woman; tramper, trashier, sluter than before.
http://www.youtube.com/watch?v=HofoK_QQxGc