The Original Demensions: 1961

from wikipedia:

The Demensions are an American doo wop group from Brooklyn, New York. Over the years, there have been a number of lineup changes. The group that sung on most of their earlier recordings includes Lenny Dell, Phil Del Giudice, Howie Margolin, and Marisa Martelli. At the height of their popularity in the early 1960s, The Demensions played often in Palisades Park, New Jersey, as well as on American Bandstand and The Clay Cole Show. They first scored radio airplay as a result of Cousin Brucie, a disc jockey at New York radio station WINS, who began spinning their version of "Over the Rainbow". The song became a hit, peaking at #16 on the Billboard Hot 100 in 1960. Their only other chart hit was 1962's "My Foolish Heart", which peaked at #95 early in 1963.