Jennifer Lopez TORE IT UP during her million dollar performance at a wedding in the Ukraine Tuesday -- rocking out to some of her biggest hits ... in front of hundreds of FIRED UP wedding guests.
Several crowd members shouted out requests during the performance -- and for the most part, she delivered ... with hits like, "Waiting for Tonight," "Let's Get Loud" and her new song, "On the Floor."
The groom -- son of Uzbek oil tycoon Azam Aslamov -- was seen smiling during the show alongside his bride.
At one point Lopez addressed the crowd -- saying, "Are you happy? I am happy because I am here with you today!"
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