With a new California law banning drivers from talking on their cell phones while driving going into effect today (July 1), Cameron Diaz was armed and ready with her hands-free headset as she pulled up to the gym.

Wearing a white top with black workout pants, the “What Happens In Vegas” hottie quickly switched back to her normal cell phone routine upon exiting her car – briskly walking past paparazzi and inside for her sweat session.

Meanwhile, in related news, Cameron’s rep has nixed rumors that she’s engaged to model Paul Sculfor – which first started after Diaz was spotted sporting a ring that all-important finger.

Her publicist told E! News, “It is not an engagement ring. It is her own ring, designed by her friend, Lenore Marusak, for La Paix.”

Gossip Girls

Enjoy the pictures of Cameron Diaz out at the gym in LA (July 1).

Photo Credit: PacificCoastNewsOnline.com