Floyd Mayweather Jr. v Canelo Alvarez

By September 15, 2013 12:59 am ET

LAS VEGAS, NV – SEPTEMBER 14: Floyd Mayweather Jr. enters the ring alongside singer Justin Bieber (L) to take on Canelo Alvarez in their WBC/WBA 154-pound title fight at the MGM Grand Garden Arena on September 14, 2013 in Las Vegas, Nevada. (Photo by Al Bello/Getty Images)