You might recall that way back in the 90s, Jennifer Lopez burst onto the red carpet scene as a relatively unknown dancer with a budding career in music, a famous rapper boyfriend (the artist formerly known as Puff Daddy), and one other major asset: her statement-making backside. Since then, with the arrival of the Kim Kardashians and Iggy Azaleas of the world, J.Lo's bum has fallen a bit, well, behind. (Pun intended.)