Jennifer Lopez, Pitbull and Brazilian singer Claudia Leitte officially kicked off the 2014 FIFA World Cup in Brazil on Thursday, June 12, 2014, with a performance of We Are One -- the official song of this year's World Cup -- but it wasn't without a little controversy.
Critical viewers took to Twitter to complain about a sound issue that made it hard to hear the trio sing.
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It was initially reported that Lopez wouldn't be performing at the 2014 FIFA World Cup Opening Ceremony, but the 44-year-old superstar did indeed bring her signature flair to the event in a dazzling green bodysuit.
Around one billion people are expected to watch the opening ceremony and match on TV, and more than 60,000 fans will be in Sao Paulo's Corinthians Arena.
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The World Cup runs from June 12 to July 13, 2014 in Brazil.