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Hey, she's preggers and it's hot outside!

Mom-to-be Ashlee Simpson swung by the DMV with hubby Pete Wentz to take her driver's test - she passed! - and then headed over to Cafe Med to celebrate...

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After lunch Pete had to get a little tough with the paps when they wouldn't move over and allow him and Ash through, shouting "she's pregnant!" We must admit, there's a LOT of people following this couple around.

Check out the crazy scene below!