Bjork's first album for four years is an extremely odd affair, which will surprise no-one who's followed the Icelandic chanteuse's increasingly bizarre career. Supposedly a soundtrack to her new-found domestic bliss, Vespertine ("occurring in the evening") is an intriguing blend of electro-pop, traditional instruments and celestial choirs. That it holds together as well as it does is largely due to Bjork's fluttering vocals, which is as wild and as unhampered by rhythm as ever. Probably her most low-key and uncommercial album yet, it's still got more than enough moments of delicate magic to keep her fans happy.