Kim Kardashian's bum rated 'world's best'

Kim Kardashian has the best bum in the world, according to the results of a new poll conducted by ZOO magazine.

Kim Kardashian. Pic/AFP

The 31-year-old socialite beat off stiff competition from the likes of Rihanna, Scarlett Johansson and Pixie Lott to bag the coveted title.

Voted for by more than 2,000 readers of the magazine, the top 20 also featured the likes of Jessica Biel, Shakira, The Saturdays' Frankie Sandford and new mother Beyonce Knowles, who gave birth to her first child, daughter Blue Ivy, just last month.

However, despite causing a worldwide stir after she squeezed her buttocks into a curve-enhancing Sarah Burton for Alexander McQueen bridesmaids' gown at last April's royal wedding, Pippa Middleton only managed to bag 36th place.

Elsewhere, Cheryl Cole was notably absent from the top 20, while Jennifer Lopez and Kylie Minogue's famous derrieres only came in 22nd and 27th places respectively.

"Kim's curves are famous the world over, so there could only ever really be one winner when it comes to the World's Best Bum," Contactmusic quoted Damien McSorley, editor of the magazine as saying.

"While we were surprised that Pippa Middleton didn't make the top 10, it was good to see Pixie Lott flying the flag for Britain in the top five. But where was Cheryl (Cole)?" he said.