* Singer Neil Diamond appears during his concert in New York's Rockefeller Plaza on the NBC "Today" televison show, in this Friday May 2, 2008 file photo. Disappointed Neil Diamond fans are demanding a refund after attending a concert at Ohio State University in which the 67-year-old singer's voice sounded raspy. A statement from Diamond on Tuesday Aug. 26, 2008 says a doctor has diagnosed acute laryngitis. (AP Photo/Richard Drew, FILE)