London, June 1 : Kylie Minogue has challenged the Duchess of Cambridge's younger sister Pippa Middleton to a sizzling battle of the buns at the Queen's Diamond Jubilee.
The 44-year-old Aussie pop star, who famously flaunted her shapely rear in tiny gold hot pants, will be singing at the concert celebrating the Queen's 60 years on the throne on Monday.
Also on the guest list is Middleton, 28, whose pert behind stole headlines when she was bridesmaid at sister Kate's wedding to Prince William last April.
Kylie called for the challenge, when she was asked by TV chat host Alan Carr whether she would have a "bum-off" with young pretender Pippa.
"I'm going to have to. I'll definitely have to (bend over and) pick something up off the ground," the Sun quoted her as saying.
Minogue, wearing a hot pink mini-dress, then leaned over and gave a wink to show the Channel 4 audience she is still in excellent shape.
And to help in her battle with Pippa, joker Carr, 35, even gave her a vibrating bottom-toning machine as a gift for her birthday, which fell last Monday.
While she is prepared to tackle the bum challenge, the singer admitted she is nervous about singing in front of the Royal Family.
"I can't tell you too much about the performance, but what I can say is I'm doing a medley," she said. (ANI)