08/30/2012 05:44 EDT | Updated 08/31/2012 12:52 EDT

Florence And The Machine's Florence Welch Gives Up Caffeine After Vocal Injury: 'I Feel So Tired, It's Awful!'

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READING, ENGLAND - AUGUST 25: Florence Welch of Florence and the Machine performs live on the Main Stage on Day Two during the Reading Festival 2012 at Richfield Avenue on August 25, 2012 in Reading, England. (Photo by Simone Joyner/Getty Images)

After sustaining a vocal injury that forced her to cancel a couple festival appearances, it's evident that Florence Welch, the central figure in Florence and the Machine, is being cautious about making sure it doesn't happen again. She's afraid that doing too many interviews might strain her voice and she's cut out all alcohol from her system (for now). But the one thing that's affecting her most has got to be the caffeine.

"I feel so tired, it's awful!" Welch tells Huffington Post Canada. "I don't drink so much on tour anyway so that's okay, but it's the caffeine that's addicting and not having Diet Coke is getting to me!"

The boozing's not so bad, though, as Florence and her machines apparently exactly Motley Crue when it comes to partying.

"We haven't been drunk in three, maybe four weeks, though, which really just means less blowouts."

Still, even with the chaos dialed back for Welch's health, she admits that touring in general has its ways of messing up the her reality.

"Touring takes over everything and it's fucked," admits Welch. "I mean, it's really organized in every way possible, but you can't deal with anything; nothing gets dealt with in your real life and you only get to be home for two weeks at a time."

That being said, Welch is aware of these downsides to her career choice and just chalks it up to "the best and worst thing" about being a touring musician.

Another thing she has yet to focus on, due to constant touring, is a new album. Rest assured, though, the singer's been hard at work in her mind, even though no words or music have hit the paper yet.

Since releasing her second album, Ceremonials, last October, Welch has definitely noticed a change from album to album.

"I think the first record was desperate for something and clawing for things," says Welch. "Ceremonials was clawing internally, more towards myself than longing for someone. It was more of a battle inside as opposed to attacking something outside."

Welch didn't spill any details on what she might have lined up on her third record, but she does admit that she already has a good vision of it.

"I've been thinking about it a lot," reveals Welch. "I think I've written a whole album in my head."