Bobby Hatfield, one half of the famed musical duo, the Righteous Brothers, had died at the age of 63.
The group's manager says Hatfield was found dead in his hotel room in Kalamazoo, Michigan Wednesday evening, shortly before he and his longtime singing partner Bill Medley were scheduled to perform at a local university.
Hatfield began performing with Medley in 1962, creating a singing style which was to become known as blue eyed soul.
In 1964, the duo recorded their biggest hit You've lost that lovin' Feelin. Other hits from the 1960's include Soul and Inspiration and Unchained Melody. They later recorded another hit in 1974 with Rock and Roll Heaven.
The Righteous Brothers were inducted into the Rock and Roll Hall of Fame earlier this year.