Jennifer Aniston and Courteney Cox to Kiss in 'Dirt' Finale

Even if you like me haven't really watched "Dirt" since the first episode, tonight's season finale is worth checking out: It brings the long-awaited guest appearance by Jennifer Aniston and, of course, the much-discussed girl-on-girl kiss.

Aniston plays rival editor Tina Harrod to Cox's Lucy Spiller, and one TV reviewer suggests that Jen even upstages her "Friends" co-star. The preview for tonight's show, which airs at 10 p.m. EDT, looks pretty juicy. In one scene, Cox says "You and I were a one-time thing," and Aniston smiles coyly. To watch the promo,