Controversial actress seen in Istanbul
Relax the back of your neck and keep your jaw open as you’re singing “ahhh.” Imagine the air spinning around in your mouth while keeping your chin tucked down a bit and your chest raised. Keep in mind, overuse of vibrato is not a good thing in contemporary singing (pop, rock and R&B). At the same time, no vibrato is also not a good thing. So, try ending phrases with straight tone, then into a little bit of vibrato. The bottom line is to do what’s best for you.