Kristina Shannon Karissa Shannon Playboy Hugh Hefner Hollywood jeans plaid shirt

And that's not Hugh Hefner she's walking arm-in-arm with! Karissa - or is that Kristina? - Shannon was spotted out in Hollywood the other night with a mystery man. The same man, in fact, she was spotted with earlier this month! Hmm, what's going on here? And what does Hugh think of this?