Never mind the flotilla on the Thames, there's a far more impressive spectacle to look out for during the Diamond Jubilee celebrations this weekend - a 'bum-off' between Kylie Minogue and Pippa Middleton.
Did we actually just write that?
The pop princess has admitted she'd challenge the Duchess of Cambridge's little sis to a battle of the bums if she runs into her at the Diamond Jubilee Concert, which she is performing at.
Speaking to Alan Carr on his show Alan Carr: Chatty Man she said: "I'm going to have to. I'll definitely have to [bend over and] pick something up off the ground."
The singer then teased the studio audience with a cheeky taster by bending over to fluff some cushions as she wore a fitted hot pink dress.
Kylie wasn't quite so forthcoming about what she has planned for her performance but did give a little hint about what she is due to sing.
Pippa Middleton's derriere was the star of last year's Royal Wedding
"I can't tell you too much about the performance," she said. "But what I can say is I'm doing a medley."
Hmmm, we wonder if those gold hotpants are going to put in a special appearance.
> IN PICS: GLAMOUR WOMEN OF THE YEAR AWARDS
