Harry Potter and the Half-Blood Prince comes out in theatres in 2 days.
This is Sarah's tattoo:
My tattoo is a lightning bolt for many reasons, the foremost of which is Harry Potter. I often say I love Harry enough that it's almost frightening. Harry Potter was the common ground that led me to my best friend, and when we used to write notes in high school, I'd sign my name with the lightning bolt. It became a symbol for Harry, friendship, and my love of reading. I had a lightning bolt charm that I wore as a necklace for years and years, and the tattoo is that necklace.