Celebrity Makeup Looks. We watch the red carpet for the glitz, the glamour, and the genius makeup ideas. The artists behind our favorite looks spill their secrets.

Sienna Miller's Classic Red Lips
Miller proves why a crimson mouth is the time-honored look for screen sirens and ingenues; makeup artist Emma O'Byrne gave it a modern twist with shimmery cheeks."
Get the Look: 1. Drag a black liner along the upper lids, going just past the outer corners of the eyes. O'Byrne recommends using gel liner, which "doesn't move and looks great." Top with black mascara.2. Swirl a pink-y brown powder blush on the apples of the cheeks, then highlight: Rub bronze shimmer powder into the cheekbones and champagne shimmer powder just above them.3. Paint on a coat of deep cherry lipstick. For a bold mouth, bust out a lip brush; for a softer approach, pat the lipstick on with your finger.