ENTERTAINMENT
10/22/2010 05:12 am ET | Updated May 25, 2011

Heidi Montag & Karissa Shannon SEX TAPE: Heidi Girl-On-Girl With Playboy Playmate

Spencer Pratt has unearthed a girl-on-girl tape featuring Heidi Montag and Playboy Playmate Karissa Shannon .... sources tell TMZ.

We're told not too long ago Spencer was at the Malibu house he once shared with Heidi ... moving out some of his stuff. Sources tell us Spencer came upon a camera with XXX video of Heidi and Karissa -- and the light bulb went off.

Read more on tmz.com

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