Soccer's governing body made the announcement Thursday but didn't say when "We Are One (Ole Ola)" will be released.
The song was written and co-produced by Pitbull. Leitte says she is looking forward to "dancing samba with Pitbull and Jennifer Lopez in Brazil."
Lopez wasn't in Rio for the announcement.
Shakira wrote "Waka Waka" for the 2010 World Cup in South Africa.
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