5. Harry Styles, 'Harry Styles'
After a stellar run with One Direction, Harry Styles could have gone anywhere he wanted. What would he try for his big solo move: Glitzy radio pop? Celebrity guests? The usual slate of big-name producers? Instead, Styles stakes his claim as a rock star, getting personal with a sublime album of Seventies-style guitar grooves. "Sweet Creature" and "Ever Since New York" are intimate acoustic ballads; while "Kiwi" lets him strut his Oasis-style self at top volume. "Two Ghosts" is a break-up lament worthy of his muse and cosmic mentor Stevie Nicks. Unlike most boy-band dudes going solo, he never sounds like he's sweating to get taken seriously – he never loses touch with the exuberance and swagger he brought to One Direction in the first place. So get used to this man – you'll be hearing a lot more from him. R.S.