It looks as though Cameron Diaz [1] may have updated her wedding ring. On Tuesday, the actress, who recently completed her second book [2], was spotted out and about in LA, flashing a massive diamond stunner [3] on her left hand. When Good Charlotte rocker Benji Madden proposed to her [4] in December 2014, he did so with a thick gold band, which Cameron had been wearing until now, and while Cameron and Benji tend to keep their relationship private, every now and then they give us a glimpse at their loving union. Keep reading to see more photos of Cameron's stunning ring, and then take a peek inside the duo's sweet love story [5].