Most Beautiful 2013

25 Beauties (and Hotties) at 25

From Amanda Seyfried to Armie Hammer, check out Hollywood's hottest crop of stars turning 25 this year

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LEIGHTON MEESTER

You'd never guess this Gossip Girl was once style challenged. "I had glasses, unplucked eyebrows, and I wore hemp necklaces!" Meester told Teen Vogue in 2010 of her look in high school. "It's only recently that I've gotten comfortable in my own skin."