A high school student's prom pictures have generated a furious debate online after some social media users accused the 18-year-old of "cultural appropriation". Twitter user Keziah, who is not Chinese, posted pictures of herself wearing a cheongsam, or qipao - a traditional Chinese dress - for her prom in Utah, USA, last week. In a widely-shared response to the pictures, one Twitter user, Jeremy Lam, tweeted: "My culture is not your... prom dress". The original tweet, and Lam's criticism on Friday night, have attracted hundreds of thousands of likes, tens of thousands of retweets, and thousands more comments as...