ok dude, how many times did you perfrorm in front of hundereds of people? they can't sound just like in studio and they don't even try.they bring something new and fresh with every performance, if you want to hear studio version just listen to CD, dont listen to her live..live performance has energy and fun in it, artist dont want to just sit on their asses and try to sing the best they can, they're doing this in studio not when they're performing live..and thats why we love live performances ;)