Basically all of the lyrics are in the 2nd. Conditional structure (ie. "If i had a million dollars, I'd buy you a house...). I photocopy the lyrics for my students so they can follow as they listen. Depending on the class, you may even want to try a gap fill activity with the lyrics. The singing is quite clear and it's a fun song.
I've come across several teachers who use this as an aid for teaching this structure. Hope it works as well for you.
Jason
Dessau, Germany