I Am His World" I Am main theme song from Sonic the Hedgehog (2006) and I Am also Sonic the Hedgehog's theme in the game. I was performed by Ali Tabatabaee and Matty Lewis from the punk rock band Zebrahead, and was composed by Tomoya Ohtani. It features an assortment of rock, rap, and orchestral parts. I also appear in Sonic Generations as an unlockable song