Looking like she just stepped out of Brazil's famous Carnival, the 44-year-old wowed the crowd in a very daring, sparkly green leotard.
The revealing costume was definitely a head turner, complete with plenty of beads, tassels and sparkles and not to mention it's plunging cut out section!
Skimming her pert derriere, J.Lo's World Cup get up definitely flaunted her most famous asset, made visible to all in a pair of diamante studded, fishnet tights.
But despite her skimpy outfit, the star had no problem strutting her stuff on stage, energetically jumping up and down with rapper Pitbull and Brazilian singer Claudia Leitte to perform their track 'We Are One (Ole Ola)', the official World Cup song for 2014.
In green, yellow and blue, the trio took to the stage donning the host country's native colours. And it was celebrations all round for Brazil as they won the opening game against Croatia, 3-1.
Despite previous reports that Jennifer was not going to perform at the World Cup opening due to production issues, the pop diva determined not to disappoint her fans made sure she was there and partied up a storm with the Arena de Sao Paulo crowd.
Jennifer's appearance in Brazil last night comes after the recent news that the 'Live It Up' singer has split from her boyfriend of two years Casper Smart. And according to recent speculation, J Lo is now rumoured to be dating friend and dancer Maksim Chmerkovskiy.
Not letting her man troubles get to her, and like a true professional, the show had to go on for Jennifer. And showing her ex exactly what he's missing, Jennifer looked fabulous on stage, clearly enjoying every single minute.
Watch the video for the official World Cup track 'We Are One (Ole Ola)' here: