Perhaps she's celebrating the fact that her most recent single "Heart Attack" has become a hit? In any event, we think it looks great!
Want to see some other stylish transformations? Check out these stars' new 'dos!
- Demi Lovato 'Wants to Go Big for Her Wedding' to Jordan 'Jutes' Lutes: She 'Has a Clear Vision'
- Demi Lovato Admits She's 'Definitely' Started Dress Shopping Ahead of Wedding to Jordan 'Jutes' Lutes: 'I'm Very Excited'
- Demi Lovato and Jordan 'Jutes' Lutes Not Even Thinking About Wedding Planning Yet After Proposal: 'It Won’t Be Traditional'