There is a difference between a shapely bottom and a big bum. Back in the day, women used to ask "Does my bum look big in this?" If it did, they would scream and change outfit. Fast forward years later, when the same question is asked, we want the person being asked to respond, "Yes it does, and it looks fabulous darling."
I've followed the Kardashians television shows and business ventures since the beginning of their rise to fame (not because of their celebrity status, as I have enough celebrity friends for that to just not wash with me); but because I see the entire family as a source of inspiration and excellent role models.