Former tennis players Steffi Graff and Andre Agassi attend the Keep Memory Alive foundation's 'Power of Love Gala' celebrating Muhammad Ali's 70th...
{"Image ImageDescription": "LAS VEGAS, NV - FEBRUARY 18:  (EXCLUSIVE COVERAGE)  (L-R) Former tennis players Steffi Graff and Andre Agassi attend the Keep Memory Alive foundation's \"Power of Love Gala\" celebrating Muhammad Ali's 70th birthday at the MGM Grand Garden Arena February 18, 2012 in Las Vegas, Nevada. The event benefits the Cleveland Clinic Lou Ruvo Center for Brain Health and the Muhammad Ali Center.  (Photo by Ethan Miller/Getty Images for Keep Memory Alive)", "Image Copyright": "2012 Getty Images"}