Aguilera tunes up for the annual tree lighting ceremony in N.Y.C. Plus: Paris & Nicole reunite, Bruce Willis on set and more

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'HARD' TO KILL

Yippee-ki-yay, John McClane is back! A blood-splattered Bruce Willis calls for a time out while filming Live Free or Die Hard (the fourth installment in the popular Die Hard action franchise) in Pasadena, Calif., on Tuesday.