This addictively catchy compilation from the tiny pop savants in the Kidz Bop cabal contains the giddiest chart-toppers from the start of this millennium. There’s a sweetness in hearing simplified versions of tracks by stars like Rihanna, Avril Lavigne and Plain White T’s, with choruses delivered en masse by a choir of exuberant elementary schoolers. And song selection is key: The breezy whoops of “The Sweet Escape” and wistful refrains of “Hey Ya!” were meant to be sung by children.