Hairstyle File: The Evolution of 'Big Hair'

What's not to love about big hair? It's fun, it's fierce, and it's wildly over-the-top, a fact that Tom Ford capitalized on when he recently enlisted Beyonce -- and her gi-normous, blonde curls -- to walk in his private fashion show! We've been so obsessed with her voluminous 'do, that we decided a "big hair" timeline was in order. From Diahann Carroll to Mariah, here are our favorite supersized styles of all time.