52. This quartet of close-harmony singers was formed at Butler University in 1948. Their (seemingly) effortless vocalese had a great influence on rock groups that emphasized vocal harmony, most notably on The Beach Boys.
From Quiz Form Fours
Answer:
The Four Freshmen
Brothers Don and Ross Barbour, along with their friends Marvin Pruitt and Hal Kratsch, formed a barbershop quartet called Hal's Harmonizers when they were students at the Arthur Jordan Conservatory of Music at Butler University in Indiana in 1948. Later that year, they switched from barbershop to jazz, and renamed themselves the Toppers. Pruitt left the group and was replaced by Ross and Don Barbour's cousin Bob Flanigan, and in September 1948, the four boys went on the road as The Four Freshmen. Their early work shows heavy influence by the Modernaires (Glenn Miller Band) and the Mel-Tones (Mel Torme's back-up group), but before long the group had found its own unique free improvisational jazz sound and went on to become a major musical force in the 1950s and 1960s, working with such jazz legends as Dizzy Gillespie and Woody Herman. Their big break came in 1950, when bandleader Stan Kenton arranged an audition for the Freshmen with Capitol Records. Their albums exposed the mainstream music lovers to their style, and they became hugely popular. Despite several changes in personnel (even jazz singers get old!) and a downtime in the mid-60s with the popularity of British pop bands like the Beatles, the Rolling Stones, the Dave Clark Five, etc., the Freshmen never lost their audience. In 2000 the group won Vocal Group of the Year in the Downbeat Magazine readers' poll. If you've never heard the Freshmen's rendition of the Ellington classic 'Mood Indigo', get hold of a copy and give your ears a treat!