If you think keeping your hair down is the only way to look sexy, think again. Whether it's a simple ponytail, a French twist, or a casual knot, pulling your hair up accentuates your neck, shoulders, and collarbones—body parts that spell sexy.

But updos aren't meant only for black-tie affairs. They go just as well with your sundress or your bikini as they do with your LBD. "There's nothing formal about these looks," says hair and makeup expert Steven Doloso, who did the 'dos in this story. "Relaxed, simple, and carefree are what these styles are all about."

Browse through the gallery for four summer-appropriate updos that will take you from day to night.

(First published in the April 2006 issue of Marie Claire Philippines, Beauty section as "Sunny Side Up;" photos by Jay Yao; hair and makeup by Steven Doloso; adapted for use in Female Network)