Ansel Elgort

From Ed Sheeran to Christina Aguilera, some of our favorite celebs helped make a difference by giving back in 2015.

Not all movie stars have sweet moves, but Ansel Elgort and Channing Tatum know a few ways to strut on the dance floor.

Maybe your asking yourself who is Ansel Elgort? Only the star of the top grossing film from this weekend's box office, 'The Fault in Our Stars'.