Alba radiates glamour in Gucci at her London Fantastic Four premiere. Plus: Britney plays switcheroo, Rosie gets to work and more

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NEW ATTITUDE

Getting support from pal Sophia Bush, Mandy Moore debuts her clothing line Mblem.'s holiday collection at Hollywood's Citizen Smith on Sunday. Moore told PEOPLE the season's dressier collection is "reflective of where I am in my life right now. I'm 23...so I'm a little bit more feminine and polished now."