Verdrehst comes from the verb verdrehen, which literally means "to twist" or "to distort." It's a versatile word that can be used in many contexts, from physically twisting something to metaphorically distorting the truth.
In this song, Lea sings, "Du verdrehst meinen Kopf, doch du darfst es" (You twist my head, but you're allowed to). Here, "den Kopf verdrehen" is an idiomatic expression meaning to make someone dizzy with emotion, to charm them, or to make them fall in love. It perfectly captures the intoxicating feeling of being smitten, even if it means losing a bit of control.
Have you ever felt so completely smitten that your world just stops? That's exactly what Lea is singing about in "Ich Mag Dich" [I Like You]. She's caught in that exhilarating, slightly scary early stage of falling for someone, where everything feels new and intense.
She admits, "Alles, was ich weiß, ich mag dich" [All I know is, I like you], even though this person is totally messing with her head. There's a hint of vulnerability, wondering if her heart might get broken, but she's willing to take the risk. It's that feeling where you can't recognize yourself, and you're just lost in their gaze, thinking, "Könnte sein, dass ich mich grad das erste Mal verliebt hab'" [It could be that I've just fallen in love for the first time]. She's so into this person that she hopes if it's all a dream, they're dreaming the same thing. It's a sweet, honest look at the chaotic and wonderful start of a new crush.