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Vocal

• 661
• Chicago News
• 1981 International Quartet Champions from Chicago, Illinois.

• 662
• Happiness Emporium
• 1975 International Quartet Champions from Minneapolis, Minnesota.

• 663
• MaxQ
• 2007 Barbershop Harmony Society International Champion Quartet

• 664
• Vocal Spectrum Quartet
• 2006 International Quartet Champions. An a cappella vocal ensemble, who sing in the barbershop style, dedicated to a mission of excellence in a cappella singing.

• 665
• Yesteryear
• 1997 International Quartet Champions from Maumee Valley/Elyria, Ohio.

• 666
• Chorus of the Chesapeake
• 1961 and '71 International Champions from Dundalk, Maryland. Member listing, calendar of events, show announcements and newsletter.

• 667
• Masters of Harmony
• 1990, '93, '96, '99 '02 and '05 International Champions from Santa Fe Springs, California.

• 668
• New Tradition Chorus
• 2001 International Champions and 8-time international silver medalist chorus. Northbrook Illinois chapter of SPEBSQSA.

• 669
• San Antonio Chordsmen
• 1960 International Champions from San Antonio, Texas.

• 670
• The West Towns Chorus
• 1987 International Champions from Lombard, Illinois.

• 671
• The Westminster Chorus
• 2007 International Chorus Champions from Orange County California

• 672
• Harborlites Chorus
• 2005 International Chorus Champions of Sweet Adelines International from Anaheim, California.

• 673
• Rich-Tones
• Three-time World Champions of Sweet Adelines International. The chorus won the title in 1992, 1996 and 1999.

• 674
• Scottsdale
• 2006 International Champion chorus of Sweet Adelines

• 675
• Valley Forge Chorus
• 1983 Sweet Adelines International champion chorus from Valley Forge, Pennsylvania.