Susan Boyle
https://www.youtube.com/watch?v=8OcQ9A-5noM
Celine Dion
https://www.youtube.com/watch?v=kBHPp9V8fcg
Nightwish
https://www.youtube.com/watch?v=2PmPlSC-3o8
Jane Zhang
https://www.youtube.com/watch?v=iMYFqhXIW1o
https://www.youtube.com/watch?v=J1reRqcEa-E
Haley Westenra
https://www.youtube.com/watch?v=BOrlCYp8TgU
https://www.youtube.com/watch?v=UQP2KK5RBHY&feature=share
Alexandra Burke
https://www.youtube.com/watch?v=_QRwvjd22eg
https://www.youtube.com/watch?v=xaWLsgxDzuw&feature=related