Part 1 is a series of performances that demonstrate the evolution of Jackie's vibrato from age 7 to 14. Of course there are countless other performances, but I chose these as exemplary. I give no analysis, just my observations.
______________________________________
"Wishing You Were Somehow Here Again" from Phantom of the Opera at age 7. Her vibrato was barely evident.
"Still Learning! After Jackie's Kean Idol competition, we got affirmation of what we had suspected - she could sing. In June '08, we started voice lessons and this was recorded in september..." At age 8, Her vibrato was more noticeable.
"9 year old Jackie Evancho s first time singing this since the first time we posted the same song on this channel! - Fun to see her improve." She was beginning to develope a beautiful vibrato.
"Ave Maria" AGT finale at age 10. Her vibrato was developing nicely, yet unpolished.
"Mi Mancherai", Dream With Me in Concert at age 11.
Comments were being made that Jackie's vibrato has a "healing frequency".
"Some Enchanted Evening", Music of the Movies at age 12
Her natural vibrato was well established.
"Can You Feel the Love Tonight", a Capitol Fourth at age 13. Her vibrato had become polished and smoother, very beautiful.
"Ave Maria", Awakening in Concert at age 14. Her vibrato had become an integral part of her vocal artistry.
Note: Part 2 will explore the purposeful changes in her vibrato from age 15 to 18 with her experimentation in pop vocal techniques, and with her interpretations of contemporary Broadway.