Ms. Lopez changes her look – and location – on a promotional blitz. Plus: Mischa Barton, the Bush twins, Jennifer Aniston and more

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DIVA DASH

In different outfits from her own clothing line, Jennifer Lopez hits MTV's TRL (right) and then shoots over to BET's 106 & Park on Wednesday to promote her upcoming album, Rebirth, due out March 1. And to keep up the momentum