Everything tastes better with butter, but this is going too far. Norwegians have gobbled up Norway's entire stockpile of butter. A hugely popular fad diet that emphasizes high-fats and low-carbs is sweeping the country. Butter is now selling on Norway’s top auction website at about four times the normal price: a 250-gram piece starts at around $13. What will they be serving for the Nobel Peace Prize ceremony Saturday?