I used Fimo Liquid to join raw Living Doll to baked Living Doll. But any liquid polymer clay is ok. Or, as an alternative, you can use a small amount of vinyl glue.
With legs you can dance. So, I leave you with the fairy waltz that plays in the video. You can see the video in a more high resolution going on Celidonia's Channel on youtube or you can see it, smaller, directly here in the blog :)