When Holly E. Thomas of The Washington Post asked Jacqui Davis (Metro Center Location) to re-create one of the hottest Fall Trends in Hair-The French Twist, Jacqui was all over it. Here are Jacqui’s tips for creating the Classic Twist at home:Modern Twists at Derek LamJacqui Davis, PR at Partners (1001 G St. NW, 202-737-0909,www.pratpartners.com)1. Derek Lam’s models sported slightly roughed-up versions of theclassic French twist, a look Davis calls ” the do for fall.” Davis recommends styling with slightly dirty hair, which is easier to work with. To combat oil, apply a hair powder at the scalp and brush through. Davis swears by the color-coordinated options from Bumble and Bumble ($19-$34).2. For model Sheila Marquez’s look, take the top “horseshoe” section of your hair (from the front hairline between the midpoints of the eyebrows to the top of the crown) and use a natural-bristle paddle brush to back-comb the underside, working in small sections from back to front.3. Spritz hair with a “working” hair spray, such as Bumble and Bumble’s Does It All styling spray ($14-$24), which lets you manipulate your hair without creating helmet head, then let it dry. Use the paddle brush to gently smooth the top layer of hair, but don’t take out the back-combing. Pinch the hair at the back of the crown and push it upward to create a bouffant. Use pins to secure.4. Back-comb the underside of the remaining hair. Apply a generous dose of working spray, and smooth the sides lightly with the brush. Pull it back as if you’re making a high ponytail, then twist to create a vertical roll. Tuck in the ends at the top, then use pins on the round side of the roll, pushing them straight through the thickest part, perpendicular to the head, and turning them sideways to slide in under the roll. The heavier your hair, the more pins you’ll need.