Stevie Nicks wants Katy Perry to marry John Mayer, as she thinks they are the perfect couple because they are so different.
The 65-year-old singer said that they seem to be a really great couple, and really care about each other, Us magazine reported.
Nicks had dedicated her song 'Landslide' to the couple after they attended her concert in Las Vegas recently.
The Fleetwood Mac singer said that she always loves to dedicate the song to people she knows really get it and appreciate it.
