Vote for the sexiest Hollywood sisters!

Sometimes sexuality lies so deep in the genes it spills over. Here then are some of the world's hottest sister-pairs. Feel free to drool all over them and then vote for who you feel is the hottest. Enjoy.

Penelope and Monica Cruz

Search for Eduardo Cruz on YouTube and you'll come across a music video by Penelope's musician brother featuring both delicious siblings in a state of extreme arousal. Penelope may well be the hottest woman in the world right now, and her sister looks a lot like her. A truly spectacular couple of hotties, this.

Kim rose to fame because of a leaked sex-tape, and then gained notoriety around the blogosphere because of her humongous posterior.

Then came a reality show where her sisters featured, and Khloe and Kourtney are now generating buzz in their own right. It's just hard to argue with all those curves.

Polish stunner Joanna Krupa is 30 now, but doesn't look anywhere like it as the supermodel continues to be a favourite on the covers of magazines like Maxim, FHM and Stuff.

Clearly men's magazines love Krupa and her younger sister Marta, and one really can't blame them for drooling on and on at this pair.

Where does one start talking about Paris Hilton? The hotel heiress with one of the most famous last names in the world has gone from sex-tape to style icon, with her handbag sized pooch showing up alongside.

Little sister Nicky's not reached quite the level of infamy as Paris just yet, but she may someday pip her to the Post. The New York Post, that is.

Erstwhile rocker and political activist Bob Geldof sure turned out a pretty pair of daughters.

Peaches Geldof has been in the news recently for some rather sensational lingerie modelling, and sister Pixie is just as hot if not more. This is one pair of tomcats we wouldn't mind getting into a scrap with.

These ones are a trifle scary, but there sure are some skeletal-fetishists out there, ensuring these scrawny starlets are among Hollywood's power elite, milking a preposterous fortune from their babyhood routine in hit television show Full House. They're trying hard to sex things up, and they certainly have their takers.

So what are you waiting for? Go vote!