Cause girlfriend is getting TRAGIC. At a very VIP yacht party in Cannes this weekend, Jessica Simpson found herself very much out of her element. She went to the soiree after attending the Vanity Fair party at Hotel Du Cap and arrived, only to find that she didn't really know anyone there. From Page Six:

The part-time girlfriend of John Mayer "spent the whole night following Leonardo DiCaprio around like a lost puppy," said our source. "He just seemed freaked out and kind of ignored her."

And the problem is that his being freaked out and ignoring her probably only encouraged her to keep mildly stalking him, since it sounds like that's what John does to her more than half the time during their "relationship."

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