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Fergie

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Nicki Minaj

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Jennifer Lopez

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Selena Gomez

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Rita Ora

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Mary J. Blige

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Jordin Sparks

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Mary Lambert

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Kandi Burruss and Todd Tucker

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Zendaya Coleman

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Jessie J

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Ne-Yo

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Sam Smith

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Christina Milian

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Charli XCX

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Diana Ross

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Jenny McCarthy and Donnie Wahlberg

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Giuliana Rancic

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Lance Bass

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Miss America Kira Kazantsev

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Tracee Ellis Ross

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'Big Brother' personality Frankie Grande

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Danai Gurira

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Luke Bryan & Caroline Boyer

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Uzo Aduba

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Heidi Klum

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Danica McKellar

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Lucy Hale

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Kevin O'Leary & Linda O'Leary

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Aloe Blacc

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Meghan Trainor

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Lauren Cohan

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Mark Cuban & Alexis Cuban

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Ansel Elgort

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Jessie J & Luke James

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Elizabeth Banks

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Pentatonix

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Singer Bleona Qereti

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Wyclef Jean

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Jaden Smith

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Star Jones

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One Direction

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Olivia Munn

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Heidi Klum

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Kate Beckinsale

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Nathan Fillion

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Grateful Dead's Bob Weir with Shala Weir, Chloe Weir & Natascha Weir

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Skylar Grey

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Taylor Schilling

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Matthew Morrison

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Mary Lambert

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Dianna Agron

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Miles Brown, Anthony Anderson, Yara Shahidi & Marcus Scribner

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Robert Herjavec

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Julianne Hough

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Nick Jonas