Harry Potter's leading lady Emma Watson turns 21 today! From big and bushy-haired Hermione Granger to gone gamine "It" girl, Miss Watson's experimented a lot with her hair over the years. She's managed to navigate her way from goodie-two-shoes onscreen to style icon off-screen, scoring a barrage of fans along the way. The British beauty mixes and matches her look to suit her location: be it front row at Chanel or hanging out at Glastonbury. We ADORE her Harry Potter and the Deathly Hallows: Part 1 London look and obviously so did Lancôme, who snapped but the starlet as its latest ambassador. To celebrate her 21st, we're taking a look through Ms. Watson's beauty files. Have a good one, Em!