This site is very interesting. However, for our students it could be a bit difficult. You must try to find songs which they know and they search it in the site. By motivating them, you can then teach different structures and vocabulary.
Teaching Grammar Through songs
I found this site via Nick Peachey 's blog. It is amazing. It enables to practise grammar through songs. You just have to type the structure you want to learn, and a list of songs will turn up which will link to a clip