ploison, sorry to disappoint you but "Pero el mundo es tuyo, esta noche eres mía" means "But the world is yours, tonight you are mine".
That's what he says to the moon when "she" answers "bueno, ya estoy cansada y mis hijas ya me llaman viejita / el pelo tan seco y mi piel ya no brilla" which means "well, i'm tired and my daughters are telling me i'm old / my hair is so opaque and my skin ain't radiant anymore" to his question "¿qué tomas lunita y porqué estás tan amarilla?" ( "tell me little moon what are you drinking and why are you so yellow?")
ploison, sorry to disappoint you but "Pero el mundo es tuyo, esta noche eres mía" means "But the world is yours, tonight you are mine". That's what he says to the moon when "she" answers "bueno, ya estoy cansada y mis hijas ya me llaman viejita / el pelo tan seco y mi piel ya no brilla" which means "well, i'm tired and my daughters are telling me i'm old / my hair is so opaque and my skin ain't radiant anymore" to his question "¿qué tomas lunita y porqué estás tan amarilla?" ( "tell me little moon what are you drinking and why are you so yellow?")