I would think any singer wants as natural and effective singing voice as possible. I would recommend discussing it with your voice teacher. And if you don't have one . . . time to get one! This way, when you "try" something you do not damage your voice in any way. And there are ways, that are natural, to get what you want -- be it belting, vibrotto or no vibrotto and how to emote a song properly for YOUR VOICE.
We are all individuals . . . being "5 time faster than Murney" is not what I want to hear or see from you or anyone. I want to see and hear your original talent and unique voice. If I want Murney, I will listen to her.
Of course, I, too, admire Murney, Menzel and Lupone and many others. Nevertheless, my voice is mine and unique to me [even if I sound like . . . whoever]. My voice teacher and I work on enhancing, improving and showing my natural lovely voice. And even, I know, for a fact . . . most of the acclaimed and best singers on Broadway [or in any genre of music], continue to study with voice teachers throughout their careers.
Love and Stage Lights,
Angela Theresa