In Spanish how to say " I'm addicted to this song"

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Hi!
I think you can say "Estoy enganchado a esta canción".
it's like "Soy adicto a esta cancion" but don`t sound negative.

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I will say: "Me encanta esta canción" or "Me vuelve loco/loca esta canción". It is more common this sentences than "Yo estoy/soy adicto a esta canción"

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Hello !
"be addicted" = " ser adicto "
However, in many Spanish-speaking countries the word "addiction" it's a little bit negative. 
I think you can use the word " fan"  or " fanático" ( "fanatic") to express the same idea.
" Soy fanático/a DE esta canción " ( "fanatic OF " )  
" Soy adicto/a  A esa canción " ( "addicted TO " )

Best wishes
Sofía.

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Literally it is "Soy adicto a esta canción"(if you are a man) or "Soy adicta a esta canción" (if you are a woman), but you can also say "Me encanta esta canción".

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Also how to say " I have this song stuck in my head"?