Troubled Kerry Katona checked herself into The Priory after the knifepoint robbery at her home.

The ex-Atomic Kitten singer said she had been struggling to cope since the 150,000 raid, which left her fearing for her life and that of her five-month-old daughter Heidi.

The source told The Sun: "It has nothing to do with drugs or drinking. It is all to do with depression. And it has obviously been triggered by what happened at her home the other night."