My little boy loves Queen!

I am wondering if we are exposing our children to the right music. This morning Kale, our 2 year old, went into his room and put in a CD in the boombox. All of a sudden I hear Queen, We will we will rock you, booming out of the room, and right along with the music is Kale's voice singing the lyrics right along with them. Surprisingly he actually knows most of the words. Maybe I should be monitoring more what CD's he is finding to listen to?!