Britney. She remains consistent to this date, yet has taken chances here and there to deliver gorgeous ballads like this one
https://www.youtube.com/watch?v=kBtBfGxNqpY
I love Avril's debut and sophomore album. But that's about it. And no, I don't dislike her now because I 'hate her new image' or because I 'can't understand that she has grown up and she's now happy and wants to sing about that' -but because the quality of her music has gone downhill since The Best Damn Thing.