Jennifer Lopez and Iggy Azalea turnt up for their AMAs performance

The duo then joined each other for some twerking and grinding, at one point back-to-back and rubbing up against each other with their pert derrieres. J-Lo, 44 was spanked by her younger counterpart several times but that's as naughty as it got for the stars as Iggy 24 then vacated the stage. The Let's get loud singer donned a sparkling jacket for the remainder of her performance - giving an impressive solo dance set, wowing the crowd with her dance.