2015 release. You want the best? Well, here it is! NOW 56: That's What I Call Music is the 56th installment in the most popular music series in the U.S. In fact, NOW is the most popular compilation series in the known universe! This collection includes tracks from Wiz Khalifa, Taylor Swift, Selena Gomez, Selena Gomez, Meghan Trainor with John Legend, Ed Sheeran and many others.