Brazilian singer Claudia Leitte, right, US singer Jennifer Lopez and rapper Pitbull perform during the opening ceremony ahead of the group A World Cup soccer match between Brazil and Croatia, the opening game of the tournament, in the Itaquerao Stadium in Sao Paulo, Brazil, Thursday, June 12, 2014. (AP Photo/Shuji Kajiyama)

Photos: 2014 FIFA World Cup

The 2014 FIFA World Cup kicked off Thursday with an opening ceremony in Sao Paulo, Brazil. The host country, Brazil, opened the tournament a…