Mashable - by Yohana Desta, Tricia Gilbride and Chris Grasinger
It’s been real, 2015. This year has given us instant rap classics, expertly crafted bubblegum pop, the return of an R&B music icon and surprise albums that still haven’t left our minds. From the experimental world of Kamasi Washington to the pop-driven notes of Adele, we’ve whittled down the year’s …