I've been googling and CC supposedly did hers at home with a L'oreal dye. I don't believe a word of it to be honest, and when I found the same dye in Boots, the colour (mahogany) looked nothing like hers.
I've been looking for ages now, since before she dyed hers that colour. I've seen a few people with it, but haven't got the courage up to ask them yet!
Any ideas?