Legendary entertainer Bill Cosby and six-time Grammy Award-winning singer-songwriter Toni Braxton will headline A Concert for Autism Speaks on April 9 at Jazz at Lincoln Center in New York City. Braxton was recently named a national celebrity spokesperson for Autism Speaks. Proceeds from A Concert for Autism Speaks will go toward examining potential environmental causes of autism as well as research on treatments for autism. NBC News' Tom Brokaw will serve as the master of ceremonies for the special evening. Tickets are available through the Jazz at Lincoln Center box office, 212-721-6500, at the $100, $75 and $50 levels, or online by clicking here. For gala and VIP ticket packages, which include a reception, please call 212-245-6570, extension 12.