A note left at a makeshift memorial to actor/comedian Robin Williams, at his star on the Hollywood Walk of Fame, August 12, 2014, in Hollywood, California. Tributes poured in Tuesday for Robin Williams after the Oscar-winning actor and comedian apparently took his own life at his Marin County home August 11 following a battle with severe depression. Williams, 63, known for high-energy, rapid-fire improvisation and clowning, was one of the most beloved entertainers of his time. One publication called him the funniest man alive. AFP PHOTO / Robyn Beck        (Photo credit should read ROBYN BECK/AFP via Getty Images)