Poor Austin Mahone!

The singer, 17, shared a photo of himself several hours ago onInstagramin a hospital gown with the caption: "I've never felt so bad."

Mahone's rep confirmed to USA TODAY that he was admitted to a hospital Thursday morning.

Earlier, he tweeted that he was going to have to postpone tonight's kick-off of his tour in Miami and Friday's show in Orlando.

"It's Doctor's orders," hetweeted. "I have a bad flu 103 fever and I can't move. If I could go I would."

Miami, he added, will now be Oct. 22, and Orlando has been rescheduled for Nov. 1.

"I can't believe this is happening its my first tour I'm so upset. I feel like I'm letting you all down," he wrote.

The heartthrob, who joined Taylor Swift on several of her tour shows, was excited to be headlining his own tour.

"I've been in the dance rehearsals for a couple weeks now just getting ready. I've gotten more dancers. I've gotten more songs I'm adding to it, so you know we got like lasers and lights and smoke," he toldMTV Newsof the 10-city trek. "And it's gonna be a huge production, so I'm really excited ... so it's gonna be a really fun tour, and I can't wait."

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