CDiaz090108_01_X17.jpg Cameron Diaz may be getting older - but she's not letting her age keep her from enjoying her birthday!

We caught the Angel at Barney's yesterday afternoon picking out a 36th birthday present for herself. 'Course, she also made sure everyone in the store caught sight of the ring on her wedding finger - man, that thing's the gift that keeps on giving!

Cameron Diaz CDiazPolice083108_01_X17.jpg On her way home from the store, we also caught Cameron flirting with a few cops. Cammy might be getting a little older, but she's still got it - hell, she never lost it!