Jennifer Aniston & Gerard Butler Relax Poolside

These pictures are going to send the are they or aren't they couple rumors into overdrive!
We spotted Gerard Butler (right) attending Jennifer Aniston's (left) ultra-exclusive birthday celebration in Los Cabos, Mexico over the weekend.
We didn't see any canoodling going on, just a lot of Gerard flashing his bum at his and looking through binoculars.
Also in attendance were pals Courtney Cox and Sheryl Crow.
So, are they a couple or just friends?

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