MEGA Demi Moore is shocking fans with her extreme weight loss as she shows off a glamorous look at the Cannes Film Festival. Stepping onto the red carpet on Thursday, the actress highlighted her super-slim figure in a crumpled red dress, going crinkly in a body-hugging column gown while stunning the camera. Showing off her flawless sense of style in another winner look styled by stylist Brad Goreski, Demi caught attention with her tiny arms and …