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Demi Lovato

Andrew Chin/Getty Images

The show must go on!

Demi Lovato is one tough cookie. The pop star revealed to fans via Twitter that she's currently suffering from a respiratory infection.

"The last thing I would ever want to do is cancel a show, with that being said I'm super sick tonight so it may not be my best show but I'm so excited to perform for you guys but I may need you to sing most of the show for me!!! Hahaha," she tweeted yesterday evening.

"I love you guys so much!!!! Thank you Long Island for an incredible night.. Soooo fun even when I'm sick!!!"

A few hours later, after Lovatics became increasingly worried about the singer's health, she revealed what was ailing her.

"For all of you that are worried, I saw a doctor and it's just a respiratory infection.."

The 21-year-old is currently on the Neon Lights tour, which will take her to South America and Mexico through the end of May.

E! News previously revealed that Nick Jonas was hired on as the musical and creative director of the entire tour.

"I'm overseeing video content, wardrobe, lighting and staging," Jonas explained.

"And then I'm extending into the musical side of things, which includes creating the arrangements for the songs. I'm building what Demi wanted, which is a show without stops and starts."