trainor's pop career sent a positive message in music but also comes with road blocks including a major problem with her vocal chords that forced her to make a tough decision. suddenly, you have a problem with your vocal cords and you got to cancel your tour when you're just really making it. >> uh-huh. >> and have surgery. and then have another surgery. how serious was your condition? >> i had an exploded polyp. a polyp looks like a boil on your -- a big pimple, a big bloody pimple on your vocal cords. >> we get the idea. >> and mine popped. so there is blood -- and, you know, it was gnarly and i had pain and they were like if you do more, you'll lose it forever. you need to stop everything and