Since 2001, Kidz Bop has served as a way station between the worlds of children’s music and adult pop. Like a karaoke bar overtaken by a middle-school cheer squad, the franchise pumps out faithful, tween-sung cover versions of Top 40 hits that double the exuberance while sanitizing the more R-rated language for PG audiences. It’s a winning formula that’s been applied to songs from across the modern musical spectrum: The Kidz transform Jimmy Eat World’s alt-rock classic “The Middle” into a motivational group chant, while delivering a choral rendition of Lizzo’s “Truth Hurts” that stakes the middle ground between the club and the church.