The California-based band Foster the People's hit "Pumped Up Kicks" has an irresistible sing-along chorus ... about a kid with a gun.
"It kind of became a single on its own," lead man Mark Foster explained. "Radio started to pick it up before we even signed a record deal."
For the first couple of weeks after the song took off, Foster admited he was terrified: "I've written so many hopeful songs about loving people, and this is the song that is going to put us on the map? But it's a platform for talking about these things."
Foster the People played an unplugged version of "Pumped Up Kicks" live on Soundcheck.