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The explicit signals used by the singer to highlight significant points of the song "Let it Go" are the following:
a. A kingdom of isolation - It means that she is alone in a place.
b. Conceal, don't feel - It means do not get affecte, do not mind and care.
c. Be the good girl, you always have to be - It means stay good and kind just like before
d. Let it go -  It means do not hold back, release it.
e. The cold never bothered me anyway - She is not afraid of of the cold because the power in her hands are way colder.
f. I'm free - It means nobody gets to tell what is right or wrong, you can do whatever you want

On the other hand, the implicit signals are the following:
a. Looks like I'm the Queen - It means that she can release her true powers, she is in control in a place she chose to stay
b. Swirling storm inside - It means that there are lots of questions, worries and confusions deep inside her.
c. Let the storm rage on - It means let all the bad things happen, let all the worst come all at once
d. I am one with the wind and sky - It means she has powerful allies and friends.
e. My soul is spiraling in frozen fractals all around - It means her soul is finally free to move anywhere, feeling carefree.