When It Comes to Sexy Halloween Costumes, Jennifer Lopez Is an Endless Source of Inspiration

Every one of Jennifer Lopez's magazine covers is a reminder of her smoking body, but this Billboard photo has us saying, "Whoa, J Lo," too.

• What to wear: Keep it simple with a red leotard or bodysuit and red pumps. And a sexy rep lip to finish the look.
• How to act: Like you're on top of the world. Make everyone say "Whoa!" when you pass by.