Position: Utility player
Currently: CEO, Lululemon Athletica
A utility player needs to play more than one position well; with her diversity of experience and deep emotional intelligence, Day is an executive any corporation would want on its bench. Before overseeing apparel maker Lululemon's successful expansion into new markets and products -- the stock has more than tripled since she became CEO in 2008 -- Day ran Asia for Starbucks, giving her key international experience. She has a cool head in a crisis (such as the time one employee murdered another in a Lululemon store), and she demands accountability from staff. Above all, she's flexible, an important trait for the CEO of a company that sells yoga gear -- and for a dream team utility player.
--Stephanie N. Mehta
NEXT: 7. Jeff Bezos