TO GOD :

I CAN SING KATHLEEN BATTLE, AND MARIA CALLAS SONGS, FREE THEN...AS THEY HAD SO MANY DEMANDS. 

https://www.google.com/amp/s/amp.theguardian.com/music/2006/dec/13/classicalmusicandopera

NOT BEING A REAL SOPRANO, BUT A MEZZO-SOPRANO, I AM BLOWN AWAY BY THIS PERFORMANCE :

https://m.youtube.com/watch?v=EXi8U1twwrc

VIBRATO :

https://m.youtube.com/watch?v=pc8SIRmXuek

BELTING :

https://m.youtube.com/watch?v=XxxncCUBLwY

https://m.youtube.com/watch?v=oHbPh4pud8w

https://m.youtube.com/watch?v=oHbPh4pud8w

R. FLEMING :

https://m.youtube.com/watch?v=8eQiKtbUv8E

https://m.youtube.com/watch?v=eZvzxTp4JqE

HITTING THE HIGH NOTES :

https://m.youtube.com/watch?v=6gHjetp4dkw

https://m.youtube.com/watch?v=8KH4TfKj07I