by Jacki Garfinkel

It's that time of the year when celebrities take off their heels and pretty shirts and replace them with boots and winter jackets. About 20,000 of Robert Redford's film fanatic friends traveled to Park City, Utah to the 2008 Sundance Film Festival. While some stars, like Adrian Grenier, have bundled up for the cold weather, other celebs, like Mena Suvari, showed off their severe fashion faux pas.

Check out more photos of your favorite stars in our Star Snapshots photo gallery.