Well, the reason is firstly because I love her songs.
This is the main reason.
For me she is a singer although she has many other aspects, such as an actress, animal lover, etc...

To tell the truth, I mainly like KING CRIMSON that is a British rock group that play the music contrary to ONJ's music in a sense.
Since I was a middle-teen I had been crazy for playing the electric guitar and recently my interest is in playing the bass guitar.
For me as an amateur instrument player KING CRIMSON is one of the ideal because they have a very high skill and technique of playing instruments.

CRIMSON's music has something like the string that is stretched too much and about to break.
CRIMSON's music is far from the ordinary popular music and rock music that have usually happy moods and relax the listeners, and of which almost all their songs are the ones about love affairs.
CRIMSON's music is very serious, uses dissonance, has a difficult lyrics, uses a complex rhythm. And I love such music fundamentally.

Then why I love ONJ's music still ?
Listening to her music I feel happy in general and after listening to the happy music why I hate them ?
Secondly I am male and her appearance matches my like.
She is a very beautiful lady and it's difficult for me to resist that kind of influence.
But the main reason why I love ONJ is her music.