2. Shoes: The Ugg boots put out by Deckers (NASDAQ: DECK ) took the top spot in Amazon's shoe category this year. News that the wool-lined shoes may have been a popular pick with shoppers this holiday sparked a mini rally in shares for the company, which are down big for the year. Still popular with short-sellers, the stock jumped 10% on Dec. 27. Deckers took the sales crown from another volatile investment over the last couple of years, Crocs, whose classic clog led Amazon's shoe category last year.