GET THE LOOK: One bob does not fit all -- your stylist can customize the cut, explains Mazzei. Full bangs with light, face-framing layers complement a rounder face like Jennifer Hudson's. For fine-haired girls like Cheryl Burke, razor-cut layers create texture and movement. For classic, clean lines, ask for a bob that's cut slightly shorter in the back with side-swept bangs, like Jaime Pressly's 'do. The key is to keep the style sleek with a drop of smoothing serum, such as Salon Selectives Smoothing Serum, $4. Add it to wet hair and blow-dry with a round brush. "For a more finished look, a flat iron is a must," says Mazzei. Our pick: Infiniti Nano Silver by Conair Steam Straightener, $130, with steam to help smooth out any kinks.