Karissa Shannon's little red dress left little to the imagination when we spotted her leaving La Vida nightclub with boyfriend actor Sam Jones III after attending an OK! Magazine party.

You know that line between sexy and slutty? She crossed it.

The 20-year-old told HollywoodLife.com at the party, "I’m working on a new book right now. It’s an autobiography. It’s going to include things about life at the mansion."

It was previously reported Karissa would be spilling some juicy details about another one of Hugh Hefner's exes--Kendra Wilkinson. But that's not entirely true. She explained, "That totally got twisted. Kendra is involved in it because she was at the mansion at the time."

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