In what was another busy day, Cameron Diaz fit in a workout at Nemo gym before enjoying a meal out at Nobu restaurant in West Hollywood, California last night (June 25).

Accompanied by an unknown married man, the 35-year-old Shrek actress also displayed a brand new ring on her left hand - made up of three circles forming a triangle.

Her latest accessory is sure to kick-start the rumor mill, as Diaz was recently spotted out kissing and canoodling with Jennifer Aniston's ex, Paul Sculfor.

In what's become an interesting spectacle, Aniston and Diaz seem to have exchanged their ex lovers -as Jen briefly dated Paul in 2007, while Cameron has been romantically linked to the former Friends star's new beau, John Mayer.

Gossip Girls

Enjoy the pictures of Cameron Diaz out at Nobu and getting in her workout (June 25).

Photo Credit: FlynetOnline.com