I mean choristers, singers in bands, etc. as opposed to sing in the shower types.
My daughter loves singing, always has. And she can hold a tune reasonably well in terms of pitch. But she's developed this habit of singing using only her mouth and nose and getting that thin childish sound rather than a proper lungful.
Any good online resources / exercises to help her. I keep suggesting to her to sing from her cheast, not her mouth but she doesn't know what i mean and I can't tell her properly myself.