LAS VEGAS, NV - MAY 03: Actor/singer Tyrese Gibson sings the United States national anthem before Floyd Mayweather Jr. takes on Marcos Maidana in their WBC/WBA welterweight unification fight at the ... more 
LAS VEGAS, NV - MAY 03: Actor/singer Tyrese Gibson sings the United States national anthem before Floyd Mayweather Jr. takes on Marcos Maidana in their WBC/WBA welterweight unification fight at the MGM Grand Garden Arena on May 3, 2014 in Las Vegas, Nevada. (Photo by Ethan Miller/Getty Images) less 
1 / 29
Getty Images | Photo By Ethan Miller / Getty Images
Sun, May 4, 2014 1:55 AM EDT