Chords for Buddy Holly - That'll Be The Day - Decca Version [HQ Audio] (). 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.Spark Chords|Buddy Holly - That'll Be The Day - Decca Version [HQ Audio]