Taylor Swift thinks it was "exciting" making a pop album.
The 'Style' hitmaker moved further away from her country roots on her latest album, '1989, but the change initially worried her record label.
She said: "[The label] were very comfortable with what we had been doing because things had been going well.
"Making my last album was sort of a hybrid between country and pop. I just thought there's no way you can keep doing the same thing over and over again and it's got to be exciting to you or exciting for fans.
"You have to change things up and some people in my team were like, 'This is a great album. We love it. These songs are incredible; this is the best work you've ever done. Can you put three country songs on it please?'"
Meanwhile, the 25-year-old singer couldn't help but gush about recently sharing the stage with Sir Paul McCartney.
For 'Saturday Night Live's 40th anniversary show, Taylor joined the Beatles legend on stage for an unplanned performance of 'Shake It Off'.
Jimmy Fallon, who also joined the pair to sing the track, asked her: "How much fun did you have the other night?... Were you freaking out because I definitely was," to which she replied, "Yes!"
During her appearance on The Tonight Show with Jimmy Fallon, the TV show host went on to describe just what happened when the three of them shared the stage.
He said: "You go, 'I'll do one of my songs' and you did and you started 'Shake It Off'. And I go, 'I don't know if Paul McCartney knows 'Shake It Off' and there he was, he knew 'Shake It Off'."