Found it:
"The superstar told Twist Magazine a big secret about her hair growing up. Taylor Swift hated her natural curls.
Taylor told Twist Magazine when she was in middle school all the most popular girls had stick straight strands.
On the other hand, Taylor had highly textured hair which was bursting with lots of curls and waves.
Tay told Twist “my hair’s naturally really curly.”"
http://www.hairboutique.com/blogs_p/...natural-curls/
Though I'm certain when she said her hair's naturally curly she means when it's like this:
as opposed to the obviously styled perfect curl look: