Muhammad Ali's Celebrity Fight Night XXI - Backstage And Audience [Getty Images]

PHOENIX, AZ - MARCH 28: Brandon Blackstock (L) and singer/songwriter Kelly Clarkson attend Muhammad Ali's Celebrity Fight Night XXI at the JW Marriott Phoenix Desert Ridge Resort & Spa on March 28, 2015 in Phoenix, Arizona. (Photo by Michael Buckner/Getty Images for Celebrity Fight Night)

Getty Images Entertainment Michael Buckner