10. Spain
Number of immigrants: 5,850,000
Traditionally, Spain, next in line on the list of easiest countries to live and work illegally, has been widely known as a country of mainly emigrants. Because of the bad economic situation, most of the Spaniards decided to find a better life somewhere else. However, that changed drastically in the last decade, and Spain now represents one of the best destinations for immigrants to work. Sectors in which there is a higher percentage of foreign workers are construction and agriculture, personal services, hotels, and restaurants, among others.