2012

SHERYL CROW

It's been a dramatic year for Crow, who was diagnosed with a non-cancerous brain tumor just weeks before turning 50 on Feb. 11. But the singer probably wouldn't want to make a big fuss over either event. "We talk about defining moments, but I think nothing can define you," she has said. "They're all refining moments. You're constantly refining yourself and refining your life."