Credit: Gotcha Images/Splash News; Splash News Photo: Famous Bums: Pippa Middleton and Jennifer Lopez

Pippa Middleton’s derriere caught the world’s attention at her sister Kate’s wedding to Prince William on April 29, 2011. Let’s be honest, it looked great in her ivory maid-of-honor dress by Sarah Burton at Alexander McQueen, so no wonder she got everyone talking. But how does Pippa stack up to butt icons such as, say, Jennifer Lopez? Let us know in the poll below!