Ed Sheeran and Taylor Swift have revealed the extreme lengths Swift goes to keep her songs secret.
In a recent interview, Sheeran spoke about the effort to keep Swift's songs from being leaked and it sounds like something out of a spy film.
He told Brazilian magazine Capricho: "I remember when I did a song with [Taylor] for her album, I was in San Francisco, and they sent someone with a locked briefcase with an iPad and one song on it.
"They flew to San Francisco and played the song I've done with her and asked if I like it...I was like, 'Yeah,' and they took it back. That's how I hear it."
But that's not all.