Former 'N Sync star has once again postponed another concert due to health reasons. Could this mean that the singer-actor is going through some serious health-related troubles?

Justin Timberlake sent out his deepest apologies to all his Buffalo fans for having postponed his concert, NY Daily News reports. His complete schedule got all chaotic when he had to cancel a New York City concert on Wednesday for unexplained health reasons. He sent his apology via Twitter and pushed the performance on Thursday and Friday.

His message to his Buffalo fans is that he'd be back even if the concert is rescheduled on July 9 to be held at the First Niagara Center. Original ticket dates will still be honored on the new schedule and refunds will also be honored.

However, many other gossip sites doubt the real reason behind his recent concert cancellations. Perez Hilton for one thinks that it could be the fastest recovery from being sick, considering how fierce the 33-year-old singer performed in front of the NYC crowd. In fact, it was even a sold out show!

He even looked dapper in his signature fashion outfit of suit and tie in black and blue as he continues his 20/20 Experience World Tour, states E! News. After just a day of rest, he also made his way back and delivered a killer performance at "The Tonight Show with Jimmy Fallon." He sang his latest track entitled "Not a Bad Thing."

Last year, there were several instances too when the "Mirrors" singer was reported to have been sick. He was also noticeably ill when he appeared as guest on "The Ellen Degeneres Show" when he celebrated "The 20/20 Experience Pt. 2" release. Isn't he that he was also reported to be sick during his wedding day with actress Jessica Biel?

What could really be happening with Justin Timberlake's state of health? Could it be anything serious?