Welcome to the family Bulgaria and Romania!

SOFIA, BULGARIA - JANUARY 01: Bulgarian revellers welcome the new year and accession to the EU on January 1, 2007 in Sofia, Bulgaria. Bulgaria and Romania joined European Union with thousands of citizens witnessing fireworks and musical concerts in their major cities. The EU now has 27 members, up from 15 three years ago, and a population of half a billion. (Photo by Daniel Berehulak/Getty Images)