Supernanny star Jo Frost has angrily told parents to "get a grip" over a worrying new trend sweeping the country. She became a household name in the early 2000s as a result of her Channel 4 series, Supernanny, in which she spent time with parents struggling with the behaviour of their troublesome children. Today, the 55-year old issues advice via social media and in her latest post she is fuming. "What the hell is going on?" she asked in an Instagram video. " Teen takeovers - they've got

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