Complex sentence: The other half of the album is original material, containing many "style parodies", musical imitations of existing artists, such as Brian Wilson, Rage Against the Machine, Sparks, animated musical specials, Cake, and 1980s charity songs.
Split into simpler sentences: The other half of the album is original material, featuring many "style parodies", or musical imitations of existing artists. These style parodies include imitations of specific artists like Brian Wilson, Rage Against the Machine, Sparks, animated musical specials, Cake, and 1980s charity songs.