bride-to-be has dropped an impressive five dress sizes after mum's gift realised she had to make changes before her wedding.Emily Drummond, 26, went from a size 20 to a size 10 after being motivated to lose weight after boyfriend Paul Campbell proposed.But she says the final straw came when her mum bought her size 20 pyjamas for Christmas.She stopped calorie-counting and eating the food she loves and has now lost more than 6st, Manchester Evening News reported.Emily said: "I joined Slimming