I use a lot of music in the classroom, especially with teens, and this was a song my students requested. This is a very simple worksheet which revises regular and irregular verbs in the past simple plus one line in the present perfect. Students listen to the song and complete the gaps. After we reviewed the answers I let them watch the video for the song. I usually point out that songs take liberties with grammar, and in this case I mentioned that "we were inseparably" should be "we were inseparable" and we discussed the meaning of this. (This could also be a good song to use with teens if you want to have a discussion about relationships.)
Currently I'm teaching the class the present perfect but I chose to use the song to shift gears in class (since my students had been working quite hard!) and to revise the past simple. Afterwards we played the game "consequences"
which involves using the past simple and the past continuous (although there are different ways to play it).
