(Cover) - EN Star Style - Cameron Diaz works out because she loves it.

The gorgeous star has been sporting an exceptionally toned figure of late. Cameron, 38, has always kept in great shape, but friends say the actress works out not only to see the physical rewards of her exercise, but also because shes most happy when shes keeping fit.

She does it because she loves it. Cams in the best mood when shes leaving the gym, or climbing off a surfboard, a friend told more! magazine.

Apart from her regular trips to the gym, the actress has always been a fan of outdoor pursuits. Cameron favours surfing above anything else, and is regularly spotted enjoying the sport. It has amazing benefits for the body, and the Hollywood stars physique is testament to the hard work she puts into her fitness routine.

Cams crazy about surfing and goes as much as possible. It requires tons of arm strength. Your triceps and biceps work hard to paddle you out to sea and to pull yourself up into a standing position, she explained. Cam also does push-ups and Pilates, and she runs on a treadmill if she cant surf. (C) Cover Media