What Were U Thinking: Ashley Greene Reveals Her Best And Worst Fashion Looks And Her Favorite Charity

The best way to handle a fashion faux pas -- like say, for example, wearing jeans with suspenders -- is admitting that your look wasn't quite right. Which is exactly what Ashley Greene does in this brand-new episode of MTV.com's "What Were U Thinking." No, jeans and suspenders isn't the best look, but at least Ashley Greene -- for whom it's pretty hard NOT to look fantastic -- cops to it and moves on.

See which looks Ashley Greene got wrong and which she got absolutely right, like the black dress and Jimmy Choos she wore to the premiere of Twilight. Plus, find out more about the dress she wore to the 2009 MTV Movie Awards, and see which dress had boats on it and secret tutu underneath!

And find out more about Ashley Greene's amazing charity of choice, Donateyourdress.org.