I couldn't if I tried

The Yule Ball is nigh and the fourth-year girls of Slytherin are jumping in excitement. None, however, are more excited than Millicent Bulstrode - plain, largely-built, boring Millicent Bulstrode. Why? Because she knows that, with a little concentration and effort, she can transform herself into the belle of the ball. Written for Round 11 of the Quidditch League.