Meghan Trainor, The 21-year-old “All About That Bass” singer, has suffered a vocal cord hemorrhage, which made her unable to speak without pain and has forced her to postpone the first two concerts of her new tour that was set to begin on Friday. Trainer was to begin her MTrain tour on Friday in Atlantic City and perform in Connecticut on the Fourth of July. The tour runs through September, during which she is scheduled to perform mostly at state fairs.