University of Michigan
University of Michigan School of Music
University of Michigan Alumni Association
University of Michigan Athletics

University of Michigan Women's Glee Club
Measure for Measure
Michigan State Men's Glee Club
Ohio State University Men's Glee Club
Rutgers University Glee Club
University of Notre Dame Glee Club
Smith College Glee Club
Penn State Glee Club
Yale Glee Club
Harvard Glee Club
Cornell University Glee Club
Flint Male Voice Choir

Boychoir of Ann Arbor
Pacific Boychoir Academy
American Boychoir
Boys Choir of Harlem

American Choral Directors Association
Intercollegiate Men's Choruses, Inc.
Llangollen International Musical Eisteddfod