John Mayer

Flynet

John Mayer was spotted sans Jenny last night, dining at a romantic eatery in Santa Monica with a mystery blond babe. Could these star-crossed lovers be dunzo again and back on the prowl? Or were they just taking the night off from stroking each other's egos? With Brangelina both up for Oscars, we're gonna go ahead and guess that Jen's sticking with her guy until at least mid-February.

But should she? J.M.'s many past and present loves are on display in our gallery, so check it out—especially if you're Ms. Aniston. She really needs her BFF Courteney Cox to toss out some matchmaking tips (and not just puss advice) on her behalf. Isn't there an Arquette sibling who can take Jen out for a steak dinner somewhere?