Mariah hangs out with Dame Joan...

WHO’S the biggest diva of them all? Evergreen Dame Joan Collins posted this snap of herself cosying up to pop star Mariah Carey. ‘Mariah in great form at a weekend party,’ Joan, 84, wrote of the singer, who sported a very low-cut top. Carey, 47, who asked for 20 white kittens when she turned on the Christmas lights in London, once said: ‘Diva just means you are fabulous.’ Opinion among fans. is split. ‘Are these two exquisite goddesses permitted to exist in the same dimension?’ gushes one. Though a rather less reverent observer unkindly quips: ‘Is it Halloween already?’