Dress 10 Pounds Slimmer!

After: Color-Blocking

This slinky dress (Karen Millen, $340) minimizes hips and thighs by putting long sections of darker color on the outside and creating a lighter, brighter central section that streamlines the body. "I don't like a lot of bareness," says Jennifer, 30, a makeup artist. "Shape is sexier than skin!" Earrings, Julie Sandlau. Shoes, Sergio Rossi.

Tip: The orange panel "paints" a slimming up-and-down line on the body.