Thanks etk! I'm thrilled with both!
You couldn't until recently! I bought them from the KM website - if you click at the top under 'Earrings' there is a drop down menu which has an option for detachable drops, click on that and there you go
At the moment you can only buy the plain gold or diamond huggies in yellow gold but hopefully other options in white and rose gold will be added at some point.
A tip to save some money is to buy detachable drops from Annoushka instead, depending on what style you are after of course as the prices vary. She also has citrine and amethyst drops in 18k gold which fit on the Kiki diamond huggies, but they are only £350 instead of Kiki's £800 per pair! Lots of other pretty options too. I am thinking of getting the pearl drops from there to wear with my Kiki diamond huggies
http://kiki.co.uk/index.php/detachable-drops.html/
http://www.annoushka-jewellery.com/fcp/categorylist/jewellery/earrings?resetFilters=true