Hello! Cognitive Hypnotherapy/NLP Practitioner has easy ways to help you retain focus and concentration whenever needed. You can visit one at the earliest.

It appears obsessive in quality. Please consult a psychologist for behaviour therapy

U need to see a psychotherapist urgently. If u want you can contact me on nine seven nine five three four five six seven eight.. at Delhi

This is a normal thing that occurs in all of us. But if you feel that it is more for you and that it is disturbing your regular activities like studying, then you have to meet a psychologist to learn methods of diverting attention from the songs back to your job at hand. This is possible only by practice and the psychologist will help you with that. All the best.