She's sweet as pie but if you break her heart
She turn cold as a freezer

from Katy Perry (Ft. Juicy J) – Dark Horse Lyrics on Rap Genius

Meaning

Katy will love you for a long time if you get the privileged of being with her. She will entrust her heart to you. This is a contract with stipulations though. If you break her out, it is over. She will not let you back in. She will “turn cold as a freezer.” Love is generally associated with warmth. Freezers are very cold (ranging from -10 to 0 degrees F). This metaphor shows that Katy will no longer love you if you break her heart. She will be so done with you. You’ve been warned.

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