We didn't know what to do with Lily and music. Our approach was a gradual one. According to this research, that seems to be the right approach. Now Lily demands music in the car, in the house and pretty much anytime she can get someone to turn it on. She's had a music therapist, been to Kindermusik and now she has music in preschool. She sings, she twirls, she makes up songs, she picks up words and says "don't turn it off yet. I want to listen to the whole song."
Music is critically important to language learning.