The Rock & Roll Hall of Fame puts it this way: "They literally stood the world of pop culture on its head ... five top positions on the Billboard pop chart, a feat never achieved before—or ...

Last week, Lady Gaga and Bruno Mars' blockbuster duet "Die With a Smile" saw its four-week reign at No. 1 end, thanks to the chart-topping debut of "4X4," by the rapper Travis Scott. This week ...

If there's one overarching theme of the Billboard charts in the streaming era, it's that the humble pop song — that most seemingly ephemeral of art forms — has developed an ever-longer shelf life.