A great pop song might feel like magic, but it's actually melodic math (and the helping hand of prolific producer Max Martin) ...
The 90s and 2000s gave birth to some of the best and worst pop songs; here are four that are the best of the worst.
Is the love song dying? NPR's Juana Summers speaks David Mora and Michelle Jia about their recent essay in The Pudding, which set out to answer that question.