John Mayer was already back in LA yesterday after his whirlwind romantic trip to Mexico with Jennifer Aniston. There's nothing quite as relaxing as lying in the sun — and being next to your hot lover doesn't hurt — even if it's just for a few days. It's not home for long for Mr. Mayer, whose Summer tour kicks off this Friday night in Copenhagen. We'll have to wait and see whether Jennifer takes the overseas trip with her man, but we wouldn't be surprised to hear about her watching him perform from the wings. Sounds like a lot more fun than spending any more time denying rumors of a Jennifer vs. Jennifer feud anyway.