Viggo Mortensen breathes a sigh of reliefWith fitting circularity, the Hobbit saga will end pretty much as The Lord Of The Rings did 12 years earlier with Billy Boyd - Pippin, no less - singing out The Hobbit: The Battle Of The Five Armies with a closing credits song. In collaboration with Philippa Boyens and Fran Walsh, the actor, singer and once-Hobbit has co-written an original song, 'The Last Goodbye', which he'll perform over the end credits, presumably using a battered orc as a mic stand, in collaboration with.