Los Angeles ( CNN ) -- `` We are One '' ? Not quite . Singer Jennifer Lopez , who was supposed to perform the official song of this year 's World Cup at the opening ceremony this week , has pulled out . `` Regretfully Jennifer Lopez will not be attending this year 's World Cup opening ceremonies , '' her rep told CNN in a statement late Sunday night . No reason was offered . Lopez teamed up with rapper Pitbull and Brazilian star Claudia Leitte to record Brazil 2014 's official song , `` We Are One ( Ola Ola ) . '' The trio was slated to perform at the tournament 's opening ceremony ahead of the host 's first match with Croatia on Sao Paulo on Thursday . The World Cup song has been a tradition since the 1966 World Cup in England , when a song dedicated to the tournament mascot , a lion named `` World Cup Willie , '' was released . Four years ago , it was Shakira telling the world to `` Waka Waka '' ahead of South Africa 2010 . Soon after the song was released , Pitbull , who has previously worked with the likes of Christina Aguilera and Enrique Iglesias , spoke of his joy at being involved in the project . `` I 'm honored to join Jennifer Lopez and Claudia Leitte at the FIFA World Cup to bring the world together , '' said Pitbull . `` I truly believe that this great game and the power of music will help unify us , because we are best when we are one . ''
Singer pulls out of opening ceremony performance . She recorded `` We are One ( Ola Ola ) '' with Pitbull and Claudia Leitte . No reason was given for her withdrawal .