After celebrating with Mayer, Simpson hits the streets of N.Y.C. to film Blonde Ambition. Plus: Patrick Dempsey, Nicole Richie and more

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SPEED READING

Between Grey's Anatomy and his newborn twins, he may only have time to look at the pictures! But Patrick Dempsey still indulges in his passion for racing, picking up a stack of automotive magazines at a newsstand in Brentwood on Thursday.

Click here to see PEOPLE's exclusive photos of Patrick Dempsey's newborn twins.