There have been numerous celebrity singers who have cancelled concerts and even tours due to vocal cord injury of some kind. Although many blame poor vocal technique in such pop singers, my feeling is probably a very demanding schedule with no backup and severe financial pressure to perform even if the vocal cords are a bit off when vocal crest would have been preferred. Here's a few singers who have cancelled over the years: • Miranda Lambert - July 2015 • Meghan Trainor - July 2…