Signature
2019 International Champion
After Hours
2018 International Champion
Main Street
2017 International Champion
Forefront
2016 International Champion
Instant Classic
2015 International Champion
Musical Island Boys
2014 International Champion
Masterpiece
2013 International Champion
Ringmasters
2012 International Champion
Old School
2011 International Champion
Storm Front
2010 International Champion
Crossroads
2009 International Champion
OC Times
2008 International Champion
Max Q
2007 International Champion
Vocal Spectrum
2006 International Champion
Realtime
2005 International Champion
Gotcha!
2004 International Champion
Power Play
2003 International Champion
Four Voices
2002 International Champion
Michigan Jake
2001 International Champion
PLATINUM
2000 International Champion
FRED
1999 International Champion
Revival
1998 International Champion
Yesteryear
1997 International Champion
Nightlife
1996 International Champion
Marquis
1995 International Champion
Joker’s Wild
1994 International Champion
Gas House Gang
1993 International Champion
Keepsake
1992 International Champion
The Ritz
1991 International Champion
Acoustix
1990 International Champion
Second Edition
1989 International Champion
Chiefs of Staff
1988 International Champion
Interstate Rivals
1987 International Champion
Rural Route 4
1986 International Champion
The New Tradition
1985 International Champion
The Rapscallions
1984 International Champion
Side Street Ramblers
1983 International Champion
Classic Collection
1982 International Champion
Chicago News
1981 International Champion
Boston Common
1980 International Champion
Grandma’s Boys
1979 International Champion
Bluegrass Student Union
1978 International Champion
Most Happy Fellows
1977 International Champion
The Innsiders
1976 International Champion
Happiness Emporium
1975 International Champion
The Regents
1974 International Champion
Dealer’s Choice
1973 International Champion
The Golden Staters
1972 International Champion
The Gentlemen’s Agreement
1971 International Champion
The Oriole Four
1970 International Champion
Mark IV
1969 International Champion
Western Continentals
1968 International Champion
Four Statesmen
1967 International Champion
Auto Towners
1966 International Champion
The Four Renegades
1965 International Champion
Sidewinders
1964 International Champion
Town & Country Four
1963 International Champion
The Gala Lads
1962 International Champion
Suntones
1961 International Champion
The Evans Quartet
1960 International Champion
The Four Pitchikers
1959 International Champion
The Gaynotes
1958 International Champion
Lads of Enchantment
1957 International Champion
The Confederates
1956 International Champion
The Four Hearsemen
1955 International Champion
The Orphans
1954 International Champion
The Vikings
1953 International Champion
The Four Teens
1952 International Champion
The Schmitt Brothers
1951 International Champion
The Buffalo Bills
1950 International Champion
The Mid-States Four
1949 International Champion
The Pittsburghers
1948 International Champion
The Doctors of Harmony
1947 International Champion
The Garden State Quartet
1946 International Champion
The Misfits
1945 International Champion
The Harmony Halls
1944 International Champion
Four Harmonizers
1943 International Champion
The Elastic Four
1942 International Champion
The Chord Busters
1941 International Champion
The Flat Foot Four
1940 International Champion
Bartlesville Barflies
1939 International Champion