Coleen Nolan has taken to Instagram to clear up speculation that the mystery 'diva celeb' she opened up about earlier this week was referring to any of her ITV Loose Women co-stars.The 56-year-old revealed during a podcast that she was "disappointed by the behaviour of a certain star behind the scenes." As fans tried to work out who she could be talking about, Coleen has quashed any speculation by addressing it directly on Instagram.The star reassured fans that she was not talking about any of