Justin Bieber Postpones NY State Fair Show Due To Illness

Singer had to reschedule Sunday's Syracuse show for Wednesday.

Justin Bieber may only be a 16-year-old pop star, but he usually has the stamina of a globe-trotting Olympic marathoner. Despite his superhuman ability to jet from one coast to the next on a weekly basis, however, even the Biebs gets taken low every once in a while.

That was the case on Sunday, when Bieber was forced to cancel his concert at the New York State Fair in Syracuse due to illness. According to the fair's website, Bieber bailed on his Sunday night show and rescheduled for Wednesday (September 1). Because of the switch, promoters were also forced to push Wednesday's previously scheduled Bieber show at the Verizon Wireless Arena in Manchester, New Hampshire, to December 9.

On Friday, Bieber tweeted that he was psyched for the weekend's shows but was not feeling well. "Next is Jersey, then Syracuse, then MSG in NYC for the 3D movie!!" he wrote that night. "Been super sick lately but u guys are carrying me. thank u for the love."

He was reportedly energetic during his show at New Jersey's Prudential Center on Saturday night, though, showing no signs of the impending ... Bieber fever.

But on Sunday afternoon, Bieber's enthusiasm had clearly been sapped a bit. He tweeted," really don't know what to twitter ... I'm getting rest right now and trying to recover from the not so good news from the doctor."

Though he didn't mention that the Syracuse show had been canceled, he followed with a shout out to fans. "I'm gonna be OK just need 2 rest but I wanted all of u 2 know I never want to let any of u down. I really appreciate all the kind words."

The New York Daily News reported that the singer's spokesperson vowed that Tuesday's Madison Square Garden show will go on, which is good news for fans who were hoping to be part of Bieber's 3-D movie, which is slated to take place at the concert.