Hayes, 23, also tweeted, \"I am so beyond bummed that our show had to be canceled. St Louis fans, your shows are always epic. We miss you and cannot wait to come back!\"
Nixon declared a state of emergency on Monday and activated the National Guard.
The move was made with the impending grand jury decision about whether Ferguson police officer Darren Wilson will be charged in the Aug. 9 shooting and death of Michael Brown.
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