Diablo Cody -- Hollywood Golden Girl

In "Juno" screenwriter Diablo Cody's case, winning an Oscar really does change everything ... about yourself.

Diable Cody

Here's the former stripper turned hipster scribe back on Oscar night in 2008 (left) -- and the sleek and styled corporate cool 31-year-old at her "Jennifer's Body" premiere in Toronto on Thursday (right).

Honest to blog, she's gone from goth to glam.