Justin Timberlake canceled yesterday's concert at New York's Madison Square Garden.
Singer broke the news on Twitter Wednesday afternoon:
Hello, New York. It is always difficult to do ... But, unfortunately, I have to postpone today's show on Friday for health reasons. I apologize to everyone who bought tickets for this evening. It kills me the most. I hope to see everyone on Friday.
Likely temporary problem, since today's concert The 20/20 Experience World Tour so far remains in force.