Blake Lively was on the David Lettermen show last night in this amazing pink/purple dress. It changes color depending on the angle you look at it at.

Blake started the interview off with telling David that Julia Roberts and her were going to take him to a polygamist colony and marry him. I guess she has always had a childhood crush on the both of them. David acted a bit awkward but we all know he has to like a young girl like Blake hitting on him.

Blake also mentions that she is off next week as the show goes on hiatus for the season. They really have worked hard to make up for the writer’s strike last year. I hope she enjoys Disneyland when she goes next week.

[Images by WENN]

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