Title: Senior VP-marketing
U.S. budget: $165 million
Agencies: Publicis Bloom; McCann-Erickson Worldwide.
Power play: Ms. Hamilton was responsible for this year's successful U.S. integration of the L'Oreal haircare division with L'Oreal cosmetics and fragrance units, leaving her in charge of marketing for the single biggest brand spender in the beauty category. She has used that platform to extend L'Oreal haircare's "Because I'm worth it" slogan to all other L'Oreal categories-even a variation on that theme for new L'Oreal Kids haircare products.