Taylor Swift - 'Bad Blood'
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From Ed Sheeran To Taylor Swift - 23 Songs Written About Other Celebrities
5. Taylor Swift - 'Bad Blood'
Taylor's the queen of writing songs about people, and 'Bad Blood' was written about her former friend Katy Perry who reportedly poached some of her tour dancers. Katy took to Twitter after the song broke to tweet, 'Beware the Regina George in sheep's clothing'. Ouch!