Kylie and Dannii MinogueCelebville is a competitive place at the best of times, but what happens when you add family to the mix?

Is it a case of famous siblings living happily ever after, or does the green-eyed monster ever raise its head?

Pondering this we decided to take a look at famous sibling duos such Kylie and Dannii Minogue, among others.

Now don't think we're choosing sides and favourites here, because we're not.

We love each side of each duo equally, but that doesn't mean they don't have the odd feud-o-rama - we're the same with our sibs, believe us.

So, check out our gallery of siblings to see if the rivalry factor is there or not.