Dannii MinogueDannii MinogueThe Minogue sisters are sugar 'n' spice and all things nice.

But ever wondered who's the naughtiest between Dannii and Kylie?

Well, Dan has spilled those, and some boob-bug beans.

Chatting to the Sun's S magazine, Dan reckons working out is a bit of a bother as her boobs are too big...

And that jogging may give her a "black eye".

But, she added: "I like to walk, I like to swim."

They also quote her as saying: "Kylie's just as naughty as me, it's just that I'm stupid so I get caught."

Smart work, Kyles.