Referencing infamous OCD sufferer, movie mogul Howard Hughes, she said, "I am so OCD. I always want to put things in alphabetical order. I am also a little Howard Hughes about germs."
The pop star, who has been dating John Mayer since her divorce from Russell Brand, hopes she can go down in history as a musical legend like her personal icon, Elton John, reported Contactmusic.
"Elton John is a man that speaks his mind. Still, to this day, I love all his takes on life and opinions. He actually says what I feel a lot of people want to say, but we are just not that Elton John iconic level yet.