6x Firmen zu „Gesangstechnik Der Stars“
1
Mischa Züwerink & Lars Dannenberg GbR 1 st Class Rock & Jazz School
2
SingVoiceStudioBerlin Sabine Lopez
3
Paton Voice Coaching Juan Paton Sanchez
4
Voiceation Vocalacademy Robin A. Dietz
5
State of Music Joab Cipriano
6