Kim Kardashian has a superior ass
Not even a contest:
https://media1.popsugar-assets.com/files/thumbor/H6KKJzw10JT2CtReZt4cQy6fZDg/fit-in/2048xorig/filters:format_auto-!!-:strip_icc-!!-:watermark-!popsugar-watermark_2x.png,-5,-5,0!-/2019/05/06/164/n/1922398/3c959c38039af749_GettyImages-1147439889/i/Jennifer-Lopez-Kim-Kardashian.jpg
https://i1.wp.com/www.sopitas.com/wp-content/uploads/2016/11/jennifer-kim.jpg
JLO has a great ass tho but Kim is Queen.