jessjohn1023.jpg archive photos of Jessica Simpson and John Mayer

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Jennifer Aniston JAniston102208_011_X17.jpg

Talk about bad timing! An X17 source reveals that before Jennifer Aniston paid boy toy John Mayer a visit at the Beverly Hills hotel yesterday afternoon, he had a run in with Jessica Simpson at the Polo Lounge! Though the former flames didn't speak, they "definitely saw each other and crossed paths." Awkward!

A solo John was spotted at the pool earlier in the day, and Jen showed up around 1pm and left around 5pm. Hmmm...wonder what they were doing for 4 hours!?

Anyway, after the booty call spending some quality time with her man, Jen headed to Sunset Towers for a bit and then went to Courteney Cox's house, where we snapped her leaving late in the evening. Whew! Looks like someone's got a schedule to keep!