Celine Dion gave fans a reason to celebrate this holiday season when she took to social media to share a rare family photograph.MORE: Celine Dion shares uplifting message ahead of the holidays The superstar singer has been posting several Christmas-themed challenges for her fans via her Instagram Stories.The latest saw her issue one while also including an adorable family portrait of herself with her three children, René-Charles and twins Eddy and Nelson.WATCH: Celine Dion delivers unfortunate