John Seabrook on the producers and writers behind Top 40 stars

This week in the magazine, John Seabrook writes about how Top Forty songs are produced. Here Seabrook talks with Blake Eskin about the producer duo Stargate and the songwriter Ester Dean, who've created hit singles for Rihanna and Nicki Minaj, among others, as well as about who controls the radio dial in Seabrook's car.