My mom isn't like someone who KNOWS albums usually, but she knows this one. "Hurt" is one of her favorite songs ever made. She still listens to it every now and then. Christina used to be one of my mom's favs around this time. Not that she bought albums or anything, but just in terms of what she heard on the radio.
Hurt had pop and AC crossover success which helped it stay on the charts for a long time in 2006. It also sold the album well into the Christmas season. It was also heavily played during Christmas 2006.