Trudy Campbell on Mad Men. Annie Edison on Community. The publicist in Scream 4. But if you'd seen any of those you'd already know that, because you don't forget a girl like Alison Brie. Ever since she somehow became "the hot girl from Mad Men," Alison Brie has been on a rampage of sexiness, and we've collected the 20 Hottest pictures she's taken along the way.
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