Michael Ostrzyga

Kammerchor der Hochschule für Musik und Theater Hamburg, Ensemble vocal, Cornelius Trantow

Christoph Schnackertz

Elkins High School Varsity Mixed Choir, John Richardson, conductor, Granbury High School A Cappella Choir, Kendra Fisher, McNeil High School Chamber Singers, Wendi Burwinkel, Montgomery High School Madrigals, Heather Orr, Wylie East High School A Cappella Choir, Nathan Dame, Angleton High School Bella Voce, Tony Stewart, Grand Prairie Fine Arts Academy Tenor-Bass Singers, Joel Duarte, Keller Central High School Chamber Women, Leigh Ann McClure, Montgomery High School Chorale Women, Wylie East High School Varsity Treble Choir, Ashley Dame, Seven Lakes Junior High Tenor Bass Choir, Kristin Likos, Tidwell Middle School Fortissimo Varsity Men, Evan Lane, Cook Middle School Varsity Treble Choir, True Hernandez, Fort Settlement Middle School Varsity Treble Choir, Kirsten Jordon, Seven Lakes Junior High Varsity Treble Choir, Tidwell Middle School Cantare Varsity Women, Trinity Springs Middle School Varsity Treble Choir, Clinton Hardy, Truitt Middle School Varsity Treble Choir, Monica Hernandez

Kölner Vokalsolisten, Ansgar Eimann