Geri Horner took to her Instagram Stories on Sunday, where she paid tribute following the news of a sad death earlier this week.The singer posted a photo of the late author Dame Hilary Mantel, who died on Thursday, with the news announced the following day.MORE: Geri Horner shares powerful message in stunning outfitMum-of-two Geri captioned the image: "Brilliant." She then went on: "RIP. Hilary Mantel.