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What year did Rihanna wear this?
ROBYN BECK / Staff
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What year did Destiny's Child wear this?
Kevin Winter/Getty Images
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What year did Lady Gaga wear this?
Jason Merritt/Getty Images
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What year did NSYNC wear this?
Mirek Towski/DMI/The LIFE Picture Collection/Getty Images
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What year did Jennifer Lopez wear this?
Dan MacMedan/WireImage
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What year did Demi Lovato wear this?
Christopher Polk/Getty Images for NARAS
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What year did John Legend and Kanye West wear this?
L. Cohen/WireImage for The Recording Academy
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What year did Mariah Carey wear this?
Ron Galella, Ltd./WireImage
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What year did Selena Gomez and Taylor Swift wear this?
Jeff Vespa/WireImage
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What year did Justin Bieber wear this?
GABRIEL BOUYS/AFP/Getty Images
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What year did Britney Spears wear this?
LUCY NICHOLSON/AFP/Getty Images
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What year did Katy Perry wear this?
ROBYN BECK/AFP/Getty Images
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What year did Swizz Beatz and Alicia Keys wear this?
Christopher Polk/Getty Images for NARAS
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What year did Adele wear this?
Paul Goguen/Bloomberg via Getty Images
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What year did Madonna wear this?
Dan MacMedan/WireImage
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And finally, which year did Pharrell wear his big ol' hat?
Christopher Polk/Getty Images
