Harp - Level 4 - Digital Download SKU: A0.794247 By American Authors. By Aaron Accetta, David Rublin, James Adam Shelley, Matthew Sanchez, Shep Goodman, and Zachary Barnett. Arranged by Stephanie Claussen. Film/TV,Pop,Rock,Wedding. Score. 3 pages. Stephanie Claussen #6433655. Published by Stephanie Claussen (A0.794247). Best Day of My Life by American Authors is a fun, upbeat pop song that works great on the harp for wedding ceremonies and cocktail hours. This arrangement includes two fun and easy pedal or lever slides!