Righteous Brother Bobby Hatfield, who with partner Bill Medley pioneered "blue-eyed soul" with hits including "Unchained Melody" and "You've Lost That Lovin' Feeling," has died of undetermined causes at a hotel in Kalamazoo, Michigan. Hatfield was 63.
Their signature 1964 single, "You've Lost That Lovin' Feeling" - produced by Phil Spector - has been cited by numerous sources as the most-programmed song in radio history: played at least 8 million times - so far. The songs resonated among other entertainers, as well as the public, and both "Unchained Melody" and "You've Lost That Lovin' Feeling" were Elvis Presley favorites during his last concerts in the 1970s. The Righteous Brothers were inducted into the Rock and Roll Hall of Fame earlier this year.