And this week on the Billboard charts: Taylor Swift’s very popular break-up single “We Are Never Ever Getting Back Together†remains very popular — as in, it is No. 1 for the second week in a row. (Lesson: America really does not care what Kennedys-by-marriage have to say.) Over on the album side, Trey Songz has his first No.1 with Chapter V, and Adele has dropped out of the “Top 10†for the first time in 79 weeks, probably because there were no more 21 CDs left to sell.