The Borefriend: SoHo-hum

TMZ cameras caught Jessica Simpson's ex-borefriend in SoHo yesterday, after eating at La Esquina with an unknown buddy. As Mayer dined inside, and by sheer coincidence no doubt, our cameraman says he saw Cameron Diaz drive by the restaurant -- but she did not stop and join her rumored plaything. Mayer came out and posed with some fans before walking away. Odd.

Also out in NYC: "Step Up" co-stars/lovers Jenna Dewan and a bearded Channing Tatum, Jamie Lynn Sigler leaving Butter, as well as Ashanti -- who had to hold up her dress to avoid having a wardrobe malfunction -- and a pimpin' Mario Winans, who were star guests at an Estrada Entertainment soiree.

It was pretty slow in L.A., TMZ cameras spotting Paris Hilton making a quick escape from Hyde and Christina Aguilera's hubby Jordan Bratman stepping out solo at Koi.