French President Emmanuel Macron has suggested that singer Céline Dion will appear at the Paris Olympics opening ceremony on Friday. The Canadian, one of the most famous French-speaking singers of all time, suffers from a rare autoimmune disease and has not performed for years. It would be “great news” if she were to perform at the ceremony on the River Seine in the heart of the French capital, Macron told France 2 TV, “because she is a great artist.” The 56-year-old is rumoured to be in the Olympic city. “Apparently she has arrived in Paris,” Macron teased, without giving further details. Dio…