Christina Aguilera Vs. Mariah Carey Head Voice, Whistle Register: C, 5 C, 7

2 Octaves of Headvoice, Whistle Register This video best captures both ladies ability using their headvoice and whistle register in a note by note battle, Hope you enjoy it, please comment, rate and subscribe :) Head Voice Register: C, 5 D5 Eb5 E5 F5 F, 5 G5 G, 5 A5 Bb5 B5 C6 C, 6 D6 Super HV, Whistle Register: Eb6 E6 F6 F, 6 G6 G, 6 A6 Bb6 B6 C7 C, 7 br, br,