I heard you on the radio saying that singing uses different parts of the brain?
Absolutely. When we organise our thoughts into words and form vowels and consonants that is mostly the cognitive side of the brain (left) but for singing we also need melodic shape and that requires the creative side of the brain (right). In fact, singing is good for us because it uses both hemispheres of the brain.
We will often ask students to experiment with different sounds in their speaking voice, before taking those sounds into singing. This can help them discover new vocal setups cognitively before they add their personal creativity.