I think she sounded fine. TVs tend to be more shaky (probably the mic rather than the singer) and a voice does not function the same every day. There could be a lot of reasons one sounds stronger or weaker (sleep, sickness and so on...) + it naturally ages - everybody is bound to sound different. One uses it - even if you don't sing it changes.
she looked great, wird medley tho with 0 effort in transitions (unlike Kpop who get better remixes and stuff...something japan is slow on)
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