I happened to catch her show sometimes after Newlyweds and I noticed that she went to see a doctor several times for straining her voice...never mentioned anything about acid reflux.
Can she sing? Yes, and only sometimes. I\'ve only seen a few concerts on her MTV show, one of them happened to be at a school for sick children and it was just her and an acoustic guitar player and she sounded great that day.
Her performance at the RMA\'s was awful, imo.