Listen up, kids: class is now in session! Just take one look at Christina Aguilera [1]'s sexy look at the 2018 Billboard Music Awards [2] and you'll see why. The "Accelerate" singer [3] graced the red carpet in a black-and-white striped number that reminded us of the schoolteacher we wish we had when we were in grade school. Christina paired her made-to-be-seen outfit with black heels, but she didn't let her bold ensemble stop her from having fun on the carpet. The 37-year-old mom of two [4] got playful with her poses, even making silly faces in a few snaps. There's the Xtina that we know [5]! Keep reading to see more of Christina's look from every angle, then relive Demi Lovato [6].
