Life on Mars, sung by the guitarist on the beach, is in an advert for 3 mobile, not Orange. Not sure if the answer or the poster are confused on this one - just trying to help! The latest [to my knowledge] guitar-based track on an Orange advert is 'adventure.exe' by the artist 'Final Fantasy'
Im not sure if its the same person but Seu Jorge sang spanish versions of Bowies classics for the soundtrack to the film 'The life aquatic'. Check it out cos if you like that advert you will love this album.