There is no stopping the 21st century's most massive musical empire: KIDZ BOP. Since first being introduced in 2001, the self-proclaimed "No. 1 music brand for kids" has transformed pop music's greatest hits — even the most explicit of chart-toppers — into kid-friendly versions. It's proven to be a huge success, with multiple albums reaching No. 1 on the U.S. Kids charts nearly every year.