B-Flat Tuba,Tuba Solo - Level 2 - Digital Download SKU: A0.1392980 By Natasha Bedingfield. By Danielle Brisebois, Natasha Bedingfield, and Wayne Rodrigues. Arranged by Matheus Felix. Pop. Individual part. 2 pages. Matheus Felix #976525. Published by Matheus Felix (A0.1392980). Sheet music for the song Unwritten by Natasha Bedingfield for solo instrumental. Have fun!