Bisa dibilang, Demi Lovato termasuk selebriti yang wajahnya gampang berubah tergantung makeup yang digunakannya. Satu waktu terlihat super cantik, di waktu lain terlihat too old for her age. Since today is her birthday, we present you 10 best looks of Demi Lovato for the last two years. Here they are!