Taylor Swift is never afraid to write songs about people she knows, and fans think they've gotten another one. On June 5, Swift, 33, revealed the track list for "Speak Now (Taylor's Version)," and it includes six previously unreleased tracks she wrote during the original "Speak Now" era that she calls "vault" songs. The songs include one called "When Emma Falls in Love," and fans immediately wondered if the track could be about actor (and Swift's friend) Emma Stone. When the song was finally released on July 7, they scoured the lyrics for clues, and later that day at her Eras Tour show, Swift performed it live for the first time and seemed to confirm it's about Stone. Here's what to know.

Stone, 34, attended Swift's Eras tour back in March, and when she talked to Vanity Fair about it in an article published June 5, she revealed some details about her and Swift's long-lasting friendship.