@@johanderbitriaga8794 I'm going with 18 since the announcer said, "to perform the Golden Globe nominated song Reflection." Christina's birthday is in December, and she would've turned 18 in 98. It all depends when this performance took place.
I wouldn't say it's her best performance, but do agree with the rest of your comment. I wish they would've let her end the record version the way she did here with the way she belts Inside.
She was young here, so her voice could take a lot of the bad habits of belting with an unhealthy technique. This is probably her best live rendition of the song she did during her young days. But the 2020 version she did for the Christmas special was also very good. She sustained more notes, allowing crescendos and vibratos to seep in, and she was more restrained in terms of riffing, which sort of balances Xtina's tendency to oversing.
My little powerful queen. I see hints of the little girl singing in morning shows, the little girl in mickey mouse club...it warms my heart to see her determination at such young age and I can only imagine how innocent she was, so eager to fulfill her dream. I'm a proud OG fighter who has followed her since 99