Steven Tyler, Roger Daltrey, Lionel Richie and Christina Perri will perform at a fundraiser for the Voice Health Institute next week in L.A. Proceeds from The Raise Your Voice Benefit on January 24th at the Beverly Hills Hotel will go toward research on ways to restore speaking and singing ability to people whose voices have been lost or damaged by disease or trauma. Tyler and Julie Andrews are serving as honorary co-chairs for the evening. All four performers have had successful vocal cord surgery done by the Institute's founder, Dr. Steven Zeitels.