John Mayer stepped out yesterday in his third set of wheels in as many days, only this time it wasn't his name on the registration. After getting pulled over on Tuesday for not having plates on his Range Rover, John Mayer borrowed Jennifer Aniston's wheels for his errands around LA. As usual, he acted as amateur photographer out the window while the paparazzi played right back with him. Between letting him bond with her BFF and lending him her car, things are getting pret-ty serious with Jen and John. Their time at her home in LA has to come to an end fairly soon as he sets out on a Summer tour, but the adorable Marley & Me teaser trailer reminded me that hopefully the next time we see either of these two on the beach they'll be together.