I use this song to help my students form questions in English.
Whenever they want to ask a question I start singing "What do you mean?" to help them and then I can get them to substitute verbs if necessary. What do you think? What do you want? What do you see? etc...
The song is of course available for play through YouTube.com you can even find the ones that display the lyrics instead of the music video.
I realize a lot of people don't like Justin Bieber, but some of his songs' lyrics are perfect for beginner English learners! They have simple lyrics, and wonderfully useful and teachable expressions.
Also, the girls love Justin Bieber so you'll have their attention for this lesson.