Chords for ROCKSTAR: Nadaan Parinde (Full Song) | Ranbir Kapoor | A. R. Rahman | Mohit Chauhan | Irshaad Kamil (). Spark is the smartest and most interesting app to learn and enjoy playing guitar. Spark is an all-around app for beginners and advanced players to learn any song with chords or master new skills with hundreds of lessons and games in Spark.