The pop star rocks a Star of David pendant during a night out with beau Isaac Cohen in Hollywood. Plus: Paris & Nicole, Sienna Miller and more

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A DAY AT THE OFFICE

After a day's work, Brad Pitt makes a shady exit from his West Hollywood office on Monday. The Babel star, who is currently filming The Mysterious Case of Benjamin Button in New Orleans, has been in L.A. to mourn the death of partner Angelina Jolie's mother Marcheline.