Opera singer Olga Averino always told her students to study the text of a song BEFORE they were going to sing the song. Why? Because when you understand what the text is about and understand what the words mean to you personally, only then you will be able to produce the sounds needed to turn the song into a magical experience.
Your body will automatically come into the right attitude for singing this particular song. Your technique will improve instantly!
Using your imagination and musicality to improve your singing is a complete different journey than pure technical singing. In the end, a good vocal technique gives you the FREEDOM to express yourself to the fullest. But the other way can work as well: express yourself while singing and it will generate a FREEDOM in which your voice will be able to sing effortless and full of colour.