You hear them all the time, but often don't know what they look like, the amount of work they do or the variety of voices they can offer up. We're talking, of course, about voice actors - the individuals who lend their vocal chords to commercials, cartoons and promos for TV and film (among other things). Naomi Mercer has been a top performer in the industry for a decade, lending her voice to a large variety of roles. She gi...