Cameron Diaz continued to unwind from her long days on the set of My Sister's Keeper by enjoying the Hollywood nightlife at Balbi on Monday night. She's always been a party girl, but it's been awhile since she's been in a relationship and she usually gets over the fling thing pretty quickly. So we're starting to wonder if she's got a secret romance up her sleeve — like with Matt Dillon for example? They broke up a long time ago, but were spotted together at the Chateau Marmont. We know Cameron is all for staying friends with her exes and it would be pretty cute to see a reunion between these former co-stars who might have suffered from their original relationship simply happening at the wrong time in their lives. Is now the right time?