Starting today, sing this song when you are wishing someone 'Happy Birthday'. Presenting the cool new way to sing Happy Birthday from Disney's ABCD 2. br br Song - Happy B'day br Music - Sachin - Jigar br Singer - Sachin Sanghvi, Jigar Saraiya, Varun Dhawan & D. Soldierz br Lyrics - Mayur Puri & Rap by - D.