You can, but you probably shouldn't. A song has a melodic and harmonic shape, you're asking to distort it. But it happens. Check out the various tricks arrangers use in 'New York (start spreading the news...' to make the last verse SOUND like it's going up a key when in fact it stays put, or even goes DOWN a key to facilitate the big last note!

You can, but you probably shouldn't. A song has a melodic and harmonic shape, you're asking to distort it. But it happens. Check out the various tricks arrangers use in 'New York (start spreading the news...' to make the last verse sound like it's going up a key when in fact it stays put, or even goes down a key to facilitate the big last note!