These two just seem so incompatible. John Mayer has been with so many girls, from Jessica to Minka to Rumer to Mischa - Jen is so far out of his league. How could a woman who dates so many beautiful men go for a guy who made out with Perez Hilton? He's not even on par with Vaughn.

Another grain of doubt: The two were photographed sunbathing together, draped over each other, laughing and having a great time. And no, they didn't look drunk. They looked contrived, like they were on set, not on vacation.

Is this another Ashton trick? In Touch, Us Weekly and even People all say this is real, true love, even though they've only gone out a couple of times. Will John stick around longer than Vince, Paul or Jason? It's hard to say; she must be a handful, especially now that she's getting older and set in her ways.