Elton John has shared uplifting news with fans a week after he revealed an agonising health update that left fans in tears.The singer took to Instagram to post a selfie with musician Charlie Puth, captioning the post: "Exciting week ahead," before revealing the release of their duet After All.Elton was indundated with comments from happy fans with many sharing heart emojis, and one joking: "Saving the music industry."MORE: Elton John shares rare photo of his sons during glamorous summer