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Wednesday's 4th Annual White Ribbon Alliance dinner hosted a number of A-List looks, including Naomi Watts' sleek "lob," Natalia Vodianova's romantic waves, and Jessica Alba's chic chignon.

Which of the stars pictured above top your Best Tressed list?

(Clockwise, from left: Naomi Campbell and Gayle King, Naomi Watts, Christy Turlington, Wendi Murdoch and Nicole Kidman, Liya Kebede, and Natalia Vodianova, Geri Halliwell, Iman, Martha Stewart and Shania Twain, Tyra Banks and Molly Sims, and Jessica Alba.)