Doctors have placed Keifer Thompson on complete vocal rest forcing Thompson Square to shut it down for a while. Thompson Square is canceling four shows tonight through Sunday where they would have been opening for Luke Bryan.

Keifer Thompson said in a letter to his fans that he is suffering from a "very serious vocal condition" and has been ordered to stop singing, bringing their tour in support of the married duo's sophomore album "Just Feels Good" to a halt.

Keifer poured his obviously broken heart out to his fans in a letter that you can read in full here.