Beyonce, Rihanna, Alicia Keys, Ashlee Simpson and Nicole Richie celebrate the 50th anniversary of the awards.
Rihanna chose an electric blue Zac Posen frock to pick up her Best Rap/Sung Collaboration Grammy for the smash hit "Umbrella", featuring Jay-Z.
Rihanna talks fashion exclusively with In Style
See more Rihanna
Check out the full list of winners at grammy.com
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LOOK OF THE DAY: Angelina Jolie
PARTIES: Changeling Premiere, New York
PARTY ANIMAL: The scoop from A-list parties
TRENDS: Best AW Beauty Buys
COMPETITIONS: Win fabulous prizes
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