Kidz Bop is an American children's music group composed like a music brand that produces family-friendly bowlderized cover versions of pop songs and related media. Kidz Bop releases compilation albums that feature children covering clean versions of contemporary pop songs that chart high on the Billboard Hot 100 and/or receive heavy airplay from contemporary hit radio stations several months ahead of each album's release. Kidz Bop releases censored and substitute profane lyrics, however, critics have commented that this doesn't necessarily remove the adult themes from the music. The concept was developed by Razor & Tie co-founders Cliff Chenfeld and Craig Balsam and released its first entry on October 9, 2001. Since its debut, Kidz Bop has sold over 21 million albums and has generated over 4.5 billion streams. Kidz Bop has expanded to include merchandise, music videos, a live touring division, and seeking talent search competitions.