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Remembering "The Greatest" - To say the passing of Muhammad Ali shook up the world would be a giant understatement. As the news of the death of "The Greatest" broke overnight, Twitter had amassed upwards of 432,000-plus "#RIPMuhammadAli" tweets [and counting] by early Saturday morning. Here, BET.com compiles the most heartfelt celeb tweets reacting to Ali's death. The memory of "The Greatest" will definitely live on. (Photo: AP Photo/John Rooney) 

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Mike Tyson - @MikeTyson(Photo: Mike Tyson via Twitter)

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George Foreman - @GeorgeForeman(Photo: George Foreman via Twitter)

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Max Kellerman - @Max_Kellerman(Photo: Max Kellerman via Twitter)

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Jay Pharoah - @JayPharoah(Photo: Jay Pharoah via Twitter)

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Gabrielle Union - @itsgabrielleu(Photo: Gabrielle Union via Twitter)

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Deion Sanders - @DeionSanders(Photo: Deion Sanders via Twitter)

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DJ Jazzy Jeff - @djjazzyjeff215(Photo: DJ Jazzy Jeff via Twitter)

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Larry Wilmore - @larrywilmore(Photo: Larry Wilmore via Twitter)

Photo By Photo: Larry Wilmore via Twitter

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Scottie Pippen - @ScottiPippen(Photo: Scottie Pippen via Twitter)

Photo By Photo: Scottie Pippen via Twitter

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Diddy - @iamdiddy(Photo: Diddy via Twitter)

Photo By Photo: Diddy via Twitter

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Emmitt Smith - @EmmittSmith22(Photo: Emmitt Smith via Twitter)

Photo By Photo: Emmitt Smith via Twitter

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Kareem Abdul-Jabbar - @kaj33(Photo: Kareem Abdul-Jabbar via Twitter)

Photo By Photo: Kareem Abdul-Jabbar via Twitter

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Tavis Smiley - @tavissmiley(Photo: Tavis Smiley via Twitter)

Photo By Photo: Tavis Smiley via Twitter

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Warren Moon - @WMoon1(Photo: Warren Moon via Twitter)

Photo By Photo: Warren Moon via Twitter

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Floyd Mayweather Jr. - @FloydMayweather(Photo: Floyd Mayweather via Twitter)

Photo By Photo: Floyd Mayweather via Twitter

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Montel Williams - @Montel_Williams(Photo: Montel Williams via Twitter)

Photo By Photo: Montel Williams via Twitter

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Neil deGrasse Tyson - @neiltyson(Photo: Neil deGrasse Tyson via Twitter)

Photo By Photo: Neil deGrasse Tyson via Twitter

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Snoop Dogg - @SnoopDogg(Photo: Snoop Dogg via Twitter)

Photo By Photo: Snoop Dogg via Twitter

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T.I. - @Tip(Photo: TI via Twitter)

Photo By Photo: TI via Twitter

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Pusha T - @PUSHA_T(Photo: Pusha T via Twitter)

Photo By Photo: Pusha T via Twitter

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Al Sharpton - @TheRevAl(Photo: Al Sharpton via Twitter)

Photo By Photo: Al Sharpton via Twitter