Shawn Mendes Cancels San Jose Jingle Ball Appearance Under Doctor's Orders

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Shawn Mendes performs onstage at Madison Square Garden on Sept. 10, 2016 in New York City.

Shawn Mendes was forced to leave fans in the Bay Area in "Stitches" on Thursday (Dec. 1). The 18-year-old singer had to cancel his appearance at San Jose's Jingle Ball after falling ill.

"I planned to fly to San Jose today, but am sick and doctors have told me I am unable to travel or perform," Mendes wrote in a memo to fans on Twitter. "I am gutted and so sorry, and I will make it up to you."

Wild 94.9 -- the iHeartRadio station hosting the Dec. 1 Jingle Ball -- even shared a video message from a scratchy-voiced Mendes, providing proof that he is in no shape to sing to a sold-out arena.

Fortunately for the 17,000 people who will be attending Thursday's show, there are still some pretty huge names on the bill to fill the Mendes void. The ChainsmokersCharlie Puth, Diplo, Alessia CaraTove LoLukas GrahamDaya and (special guest) Niall Horan will be taking the stage, and it sounds like Mendes plans to make it out to the Bay Area once he's well again.