09 November 2012Pictures of Cameron Diaz at a recent film premiere have sparked rumours that the actress may have undergone a breast enlargement procedure. The US actress was in London earlier this week for the premiere of her new film Gambit, in which she stars alongside Colin Firth.Although Diaz is known for her toned and athletic figure, the plunging neckline on her dress highlighted the size of her chest, which seemed to be larger than it was in the past. Rumours first emerged that the star might have been under the knife back in January, with suggestions that she may have boosted her cleavage by a cup size. Diaz has not officially confirmed or denied the new rumours. Breast enlargement surgery has become one of the most popular cosmetic surgery procedures in the UK and it can help to boost womenís self-esteem and give them greater confidence if they are unhappy with the natural size of their breasts.