Watch out, Cyndi Crawford – you've got some competition in the skin care ring.Demi Lovato is the latest starlet to dabble in the world of skin care, announcing her new Devonne by Demi three-step kit on Twitter today. And with years of experience rocking stage makeup for concerts and performances, we're guessing the 22-year-old knows a thing or two about giving her skin a little TLC. Lovato told People of the system, available this December, "It's so hydrating and smells incredible. And not only is it a moisturizer, but it has primer in it to help my makeup last throughout the day."