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Kristen Stewart showed off lighter locks and a lighter attitude as she flashed a smile and stopped to pose for fans outside of The Late Show With David Letterman Monday afternoon.

Wearing a one-shouldered dress and ditching the sneakers for sky-high heels, Kristen seems like she's trying to do a total image revamp (especially after that controversial "rape" comment) and it's working!

If you hadn't heard, Kristen's new film Twilight film Eclipse opens this weekend (can you wait?), and she's been heavily promoting it, with this appearance on Letterman just her latest.

Eclipse has been getting solid reviews, and has even been called the best film yet in the Twilight series. Will you be in line on opening night?