I love it, it was on my shortlist. Cotton did put me off a bit, and indeed I started an identical thread to this some time ago. I still would have used it if DH hadn't preferred other names on our list though.
How funny. I have my heart set on calling this baby dc3 due in 7 weeks fern. I love the name. Pretty but not frilly. I figure fearne cotton will be long gone off the radar in a few years. I prefer the spelling of Fern as well and the Charlottes Web character us a good association.