The 'Jar of Hearts' musician was present at the world premiere for Breaking Dawn - Part 2 - the final movie in the fantasy romance series - on Monday (November 12).
"When I first read the books, like everybody else I fell in love with the love story between Edward and Bella," Perri explained to Yahoo! Movies.
"Then, through the years, it's just become this gigantic thing with the movies and the soundtracks, and I'm very honoured to be a part of that."
Perri also recalled her experience entertaining fans who camped out for the premiere, saying: "I felt like they were my people. I was like, 'Hello, Twi-hards, I'm here!'
"I had so much fun and everyone knows how much I love Twilight... I was just one of the Twi-hards in that moment."
The Twilight Saga: Breaking Dawn - Part 2 is released on Friday, November 16. Watch a clip from the movie below:
Photo gallery - 'Twilight: Breaking Dawn - Part 2' world premiere in Los Angeles:
Copyright: Rex Features Picture Perfect