English songs in class

"Sir, let us listen to English songs," asked my students.
This is a common request from my students. Music videos seem to attract their attention. They are wide awake when I play the videos. Nothing seems to wake them up except those videos.

I ask myself these questions: Are they learning English by watching the videos and listening to the songs? Are they reading the lyrics correctly? Do they understand them?

I guess I have to try for a period of time before I get the answers. Or perhaps I cannot get them.

So, students, what say you. Let's hear from you.