She is clearly not feeling well but was doing it for the fans! Notice how she stand very straight, not able to bend forward or backward only for a little while? I think she maybe on back pain medication... I understand she was sick dues to injuries, for a long time.
Me encantan sus videos cuando pone el micrófono al público ella necesitaba sentir su público ella es la única artista q se me salieron las lagrimas cuando se fue 😢 de este mundo