STRAIGHT UP

Classic: With most male celebrities growing their hair out to some degree in 2011, the question of what to do with those extra inches is inevitable. Follow Vincent Cassel’s lead and go for a look that literally makes your hair stand on end. This style works best with thicker hair that can take some product, so avoid it if your hair is fine. After working a squirt of mousse through your hair when damp, use a brush (or your hand) and a blow-dryer on a low setting to encourage your hair to remain in a vertical position. Picture a refined mad scientist, and you’ll get the idea. Once you’re satisfied, use a brush or comb to slick back the sides of your hair. Finally, spray a thin veil of hairspray over your entire head. Note, too, that as Cassel demonstrates, wearing a little gray in your hair continues to be as cool this year as it was last.

Trendy: A hipper version of this men's hairstyle resembles a messier version of a faux hawk. In essence, it’s a faux-faux hawk. To experiment with this style, as recently shown by Ewan McGregor, apply sculpting clay or wax to damp hair if you have short hair or use a strong-hold gel if you have medium-length hair. With the help of your hand and a blow-dryer, push all your hair toward the center of your head. Don’t worry if not all of it behaves -- the point of this style is to be imperfect. Tousle your hair lightly, then finish with a shot of hairspray to keep everything in place.