Her own posterior shot to fame at her sister Kate Middleton's wedding, but Pippa Middleton wasn't a fan of Kim Kardashian's Paper mag cover

Talking about bums isn’t something you’d expect Pippa Middleton to do on a regular basis, but talk about bums she did – in politics mag The Spectator, no less.

After extolling the virtues of truffles, salmon fishing (yes, really) and wine-tasting, Pippa devoted the last paragraph of her column to, erm, Kim Kardashian‘s bum.

No year is complete without a bottom story‘, she wrote, which is a fair comment. ‘I must say that mine – though it has enjoyed fleeting fame – is not comparable. But the Kim butt story did make me pause. What is it with this American booty culture?

Kim‘s bottom isn’t new to the limelight, but last month, it went stratospheric in all its baby-oiled glory, thanks to Kim baring it in a naked photoshoot for US fashion magazine Paper. Pippa, however, wasn’t impressed.

It seems to me to be a form of obsession,’ she wrote. ‘Kim‘s aim, apparently, was to break the internet, but I’m not sure she’s going the right way about it.

Pippa didn’t suggest any alternative ways in which Kim could have broken the internet, and really, she’s got a point, because the internet is still very much up and running. But Kim‘s cheeks went viral after the shoot, and reignited the old debate as to how natural her most famous asset is.

Bringing up the rear (sorry) in the bum stakes are Nicki Minaj, J-Lo and Iggy Azalea – their bottoms are often more talked about than their music, which is probably what Pippa meant by ‘American booty culture’.

Her own bum, meanwhile, first shot to fame at the wedding of her sister Kate Middleton, Duchess of Cambridge, to Prince William, and she narrowly lost out on the 2011 Rear of the Year award when Carol Vorderman scooped the title.

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