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Rihanna's alcoholic dad was escorted out of her glittering Diamond Ball for boozing after he promised her he had kicked his destructive habit. Daily Mail Online can exclusively reveal the superstar singer has been embroiled in a heartbreaking bid to save Ronald Fenty from his drinking demons for the past year - even putting him through an expensive Malibu rehab program. But all her hard work went up in smoke last Thursday as her star-studded charity party was reduced to farce before she even arrived.