You recall the video of the Detroit Academy of Arts and Sciences choir singing "Happy." That video came to the attention of Ellen DeGeneres, who arranged for the choir to be featured on her show, which was a total surprise for the kids and their choir director. They were under the impression that they were assembled to make another video. Being on the show wasn’t the only surprise, as Pharrell Williams and his big hat were also there, and the choir was given a check to fund their trip to Disney World and more. You can see a video of the rest of their performance without the commercial break at Blazenfluff.