Nikki Grahame, who has tragically passed away aged 38 following a long battle with anorexia.After Nikki's representative confirmed the 'immeasurably sad' news earlier today, Nikki's friends have taken to social media to pay touching tributes to the star.Glyn Wise, who appeared on Big Brother 7 alongside Nikki, wrote, "Beyond Upset! "Devastating news about the passing of Nikki Graham.