In the first link, the supporting artists are a symphony orchestra, a piano, and a chorus line of two young women – dressed modestly, so as not to take attention away from Esperanza – who plays a bass electric guitar, and who is clearly the star of the show.
Although the location is Carnegie Hall – this is clearly popular music. Where the words are drowned by the simple music.
The Wikipedia link, which is all about her also – tells how her father provided no support for her mother, who raised her as a single mother, in a very rough part of Portland. And continues to function as her role model.