Songs can be one of the best ways to make input both comprehensible and compelling. They’re also probably the only medium that can be consumed infinitely - you might listen to a song 100 times while you’re not going to read the same book 100 times.
Research confirms this:
Classroom researchers report that AE [accelerated English] learners exposed to song-based instruction develop strong listening and speaking skills. They use language from songs spontaneously in conversation, show greater risk-taking in oral tasks, and exhibit refined pronunciation and rhythm. Teachers observe high levels of enthusiasm, attentiveness, and voluntary language production among these students.