Dancers get ready backstage before competing during the 2012 Tango Dance World Cup in Buenos Aires, Argentina. The two-week long event offers more than 500 free dance lessons, concerts and recitals. Hundreds of professional dancers compete in the championA dancer has her hair done backstage during the 2012 Tango Dance World Cup in Buenos Aires, Argentina. The two-week long event offers more than 500 free dance lessons, concerts and recitals. Hundreds of professional dancers compete in the championship andA dancer combs his hair before a mirror before competing during the 2012 Tango Dance World Cup in Buenos Aires, Argentina. The two-week long event offers more than 500 free dance lessons, concerts and recitals. Hundreds of professional dancers compete inParticipants wait backstage before competing during the 2012 Tango Dance World Cup in Buenos Aires, Argentina. The two-week long event offers more than 500 free dance lessons, concerts and recitals. Hundreds of professional dancers compete in the championA couple rehearses before competing at the Tango Dance World Cup 2012, salon category, in Buenos Aires, Argentina. From August 14 to 28, Buenos Aires is hosting the Tango Buenos Aires Festival and Dance World Cup 2012. Dancers from 32 countries around theCouples compete during the 2012 Tango Dance World Cup in Buenos Aires, Argentina. The two-week long event offers more than 500 free dance lessons, concerts and recitals. Hundreds of professional dancers compete in the championship and teach many the eightItaly's dancers Eloina Martins, left, and Paolo Nelzi, second from left, among others, wait before competing during the 2012 Tango Dance World Cup in Buenos Aires, Argentina. The two-week long event offers more than 500 free dance lessons, concerts and rA couple competes during the Tango Dance World Cup 2012, salon category, in Buenos Aires, Argentina. The two-week long event offers more than 500 free dance lessons, concerts and recitals. Hundreds of professional dancers compete in the championship and tA couple competes during the Tango Dance World Cup 2012, salon category, in Buenos Aires, Argentina. The two-week long event offers more than 500 free dance lessons, concerts and recitals. Hundreds of professional dancers compete in the championship and tA couple dances during the opening day of the annual festival and championship in Buenos Aires, Argentina. The two-week long event offers more than 500 free dance lessons, concerts and recitals. Hundreds of professional dancers will compete in the champioCouples perform in front of a mirror, back, during the opening day of the annual festival and championship in Buenos Aires, Argentina. The two-week long event offers more than 500 free dance lessons, concerts and recitals. Hundreds of professional dancersCouples dance during the opening day of the annual festival and championship in Buenos Aires, Argentina. The two-week long event offers more than 500 free dance lessons, concerts and recitals. Hundreds of professional dancers will compete in the champions