16 Demi Lovato Costume Ideas That Will Make You Cool For Halloween

Demi Lovato let the world know she was a bombshell beauty when she graced the cover of Cosmopolitan in a sparkly, luxe romper — which was easily one of her sexiest looks to date.

• What to wear: A bejeweled romper with a plunging décolletage. Layer a few bracelets on each arm to pump up the glam factor.
• How to act: You don't put up with anything negative. You're in total control of your happiness, and you're just ready to have a good time.