Maybe she has allergies? I didn’t notice her voice was weird. Casey should be able to sing Shania and so should Aaron. I don’t know about Ms. Glass Blower. Her screaming at the end might not work out for her. Shania can get loud but it isn’t painful loud.
I agree, you can’t shout a shania song well. I really like Shania as a person - she’s real. But there has always been something about her voice that has always sounded odd to me. I can’t describe it, but it’s like she’s singing and talking in the back of her throat.