From the break-out stars to the songs we couldn’t get out of our heads, Richelle Harrison Plesse joins us to talk about the sounds of the past year. We check out relative newcomers, The Weeknd’s Abel Tesfay and French producer Tom Fire, and look back at offerings from the mainstays of pop, Mark Ronson and Adele. And we’ve rounded up the season’s musical treats, with a selection of Christmas songs.