It's incredibly heartbreaking to watch this— knowing that just 12 hours later, he would be gone!Seeing him give everything during rehearsal-singing, dancing, pouring his soul into every move-makes it even more difficult. He was preparing for his big comeback, offering fans one final glimpse of his brilliance.The footage from June 24, 2009, captures Michael Jackson at the Staples Center, rehearsing "They Don't Care About Us" and"Earth Song." Even in exhaustion