Michelle Heaton’s children are her “biggest supporters”. The Liberty X singer recently celebrated one year sober and though she admitted her children Faith, 10, and eight-year-old AJ – who she has with husband Hugh Hanley – should never have had to watch her battling alcoholism, they are very proud of how far she is come since going to rehab. She said: “As children, they should never have had to go through what they did. “But they’ve both been amazing. We’re all each other’s biggest fans. “Faith is currently in the midst of sitting her exams for secondary school, which she’ll be starting in Se…