Hangin' Tough, the second album by the New Kids on the Block, has sold more than seventeen million copies worldwide since it was released in 1988. But the album and the band have also been dismissed, derided and deemed uncool by the music establishment.

Almost thirty years later, the New Kids still perform the songs from Hangin' Tough.Hundreds of thousands of grown women still flock to their concerts to hear-and go bat-shit crazy for-the songs they first heard when they were teenagers. Is this mere nostalgia or can the science of music help explain the enduring success...