The most common problem with the esophagus is gastroesophageal reflux disease (GERD). It happens when a band of muscle at the end of your esophagus does not close properly. This allows stomach contents to leak back, or reflux, into the esophagus and irritate it.
About 4,290 out of the total 11,830 visual artists worked for themselves to average $49,930 per year. The next largest employers were the motion picture and video industries, where 1,970 artists earned a mean annual $65,980.
Singers can make anything from nothing to millions-depending on how good they are, what connections they have to the music industry, how popular they are, etc. An average singer making a living as a singer might make 30-50 thousand dollars a year.