She has more in common with Milli Vanilli, she lip syncs her concert, and rehearses her ad libs. If there was a power outage, she would be exposed. Imagine trying to project her music past the first 10 rows of a casino floor show. Without the power of electricity and technology, she is a lounge singer. Only the rich and eccentric can possibly go to her shows. Or kids with rich and eccentric parents.
Ah milli vanelli. I read a bunch about that one. The singers could sing except the producer recorded the vocals himself and with other pro singers and preferred other vocals on top of Millie’s looks. That was more frank Fabian’s fiasco than Millie vanelli’s fault. The artists were used for their looks
We don’t have full access to the raw live vocals of Taylor swift. I suspect she sings it all. Lots of bands do use pitch correction in studio but it is tricky to use live without occasionally getting caught due to artifacts. Would need more inside info to fully know all that. The songs don’t sound that hard to me so I suspect she sings it live. Occam’s razor.