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

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