Taylor Swift has been writing songs since she was 10 years old, when she first picked up a guitar.At 15, Swift became the youngest songwriter to ever sign a publishing deal with Sony. In the two decades since, she has built a billion-dollar empire off the strength and popularity of her musical catalog. "Everybody has their own sort of niche or specialty thing that they do that, you know, sets them apart from everybody else," Swift said in "Miss Americana," her 2020 Netflix documentary. "My storytelling i ...