Three women, three different ways to get down to the root of things. Jessica Simpson, Beyoncé, and Mary-Kate Olsen each have distinctive styles, but they share one thing in common: A refreshingly low-key attitude when it comes to touching up their roots. Each of these blonde stars can afford to have that "I just left a salon" kind of color, but letting a few roots show feels thoroughly modern — particularly in an economic cycle where pricey highlights are a luxury that many people can't take. So the next time you think about booking a color appointment, go ahead and postpone it a week or two. Judging by these trend-setters' hair, you'll be in good company.