Lionel Richie is over the moon the number of grandchildren he has is going to be growing, but he doesn’t want to be called grandpa. Music star Lionel, who already enjoys the company of his grandchildren through daughter Nicole Richie, is overjoyed his daughter Sofia is expecting. Sofia and her husband Elliot Grainge are set to welcome a daughter into the world, and released an adorable gender reveal video on social media to mark the occasion. The American Idol judge is a big family man but has worked out the nickname he wants to be called by his grandchildren – because celebrity superstar Lion…