1. The duo have been besties since high school.
They hit it off after meeting when Swift was just 15 years old during her freshman year at Hendersonville High School in Tennessee—in English class, to be exact.
2. Abigail was a main source of inspiration for Taylor’s 2009 Billboard Hot 100 hit, “Fifteen.”
The tune recollected the two's initial encounter, first heartbreaks, and learning moments: “You sit in class next to a red-head named Abigail, And soon enough you're best friends, Laughing at the other girls, Who they think they're so cool.”
3. Abigail appeared in 6 of the singer’s music videos.
Anderson can be spotted in Taylor's videos for "Picture to Burn," "Fifteen," "22," "Teardrops on My Guitar," "I’m Only Me When I’m With You," and "New Romantics."
4. Anderson was Taylor's mystery date to the 2015 Grammy Awards.
The two smiled together for photos on the red carpet and during the ceremony.
5. She attended Kansas University on a swimming scholarship, setting records for her school’s medley relay.
“First day of school freshman year we sat next to each other in English. She wanted to be a swimmer and go off on a college scholarship for swimming and I wanted to be a singer. Now she's off at Kansas on a swimming scholarship and I'm singing,” Taylor said during an Oprah interview back in 2009.
6. She's just as passionate as Taylor about her work.
Upon earning a Bachelor’s degree, Abigail worked with veterans from World War II, insuring they got proper compensation. “She's so passionate about it and it couldn't be more different from my career or Lena [Dunham]'s career, but the fact that she is so passionate about what she does allows her to be able to relate to me on that level, that I'm so dedicated to what I do,” Taylor told Entertainment Tonight of her bestie’s career choice in 2014.
7. Doritos and Reese’s Pieces candy are among her favorite snacks.
Of the chocolate-peanut butter sweet treat, she tweeted: “I have a bag handy at ALL times lately…” and also noted that choosing between Doritos flavors was “One of the most difficult decisions…”
8. Anderson brought Swift with her to a college class.
During her freshman year, Abigail brought Swift to her 400-student Journalism 101 class at Kansas University. The country-pop sensation visited after wrapping up her Fearless tour in Missouri.