Carrie Underwood reveals scary hospitalization in Germany

Carrie Underwood had a scary experience in Europe!

At an appearance on The Tonight Show With Jimmy Fallon On Thursday, the star of the 35-year-old campaign revealed that at the beginning of the month, she had a "viral thing" that led her to cancel European shows.

"I'm not canceling the shows, like, I'm going to slide on the stage and play if I have the flu or whatever, but in the UK we had to cancel some gigs," he said. Underwood in Fallon. "Basically, I had a viral thing and I woke up and I was dizzy, I could not get up, it was crazy."

Everything seemed to be going well for the singer of "Love Wins" after a series at the Tuckerville Festival in the Netherlands on September 1st. She took Instagram to send in thanks to the fans after her release and went to Berlin, Germany.

"We had so much fun tonight at the @TuckervilleNL festival! Thanks to you, the fans, for being with us and feeling welcome," she wrote alongside a photo collage of her passage to the event. "And thanks @ilsedelangemusic for hosting me on stage! I'm already looking forward to coming back to Holland! Now in Berlin!"

Ilse DeLange, with whom she shared the stage with Underwood, also went on the social media platform to thank Underwood for playing with her.

It was in Germany, however, where Underwood got sick.

"I ended up in a German hospital for three days," she told Fallon. "They were so nice and kind and we were like in our room learning German and communicating with people, I did not learn anything."

The mysterious disease has led Underwood to cancel at least two shows in the UK. On September 5, The Long Road Festival, which took place in Leicestershire, UK, announced that Underwood had canceled its appearance "due to illness".

"We have just learned that Carrie is unable to play this weekend due to illness, and our main concern is her speedy recovery.We know that you will have questions and we are committed to responding to you as soon as possible. " The festival, which took place on September 8, wrote on Twitter with a picture of a long statement promising "a fantastic range of music and experience" to its attendees.

In a second tweet the next day, the festival called Underwood "irreplaceable" before announcing that Aaron Watson would make the front row of the series originally planned for Underwood and that Danielle Bradbery would extend his set.

Underwood was also expected to appear on Radio 2 Live in Hyde Park, UK, on ​​9 September, but had to cancel the show too.

"Unfortunately, Carrie Underwood is not able to join us at Radio 2 Live in Hyde Park due to illness," the newspaper wrote on their website. "We wish him good luck and look forward to welcoming him to Radio 2 in the future."

The disease comes less than a year after the serious fall of Underwood – where the singer of "Before He Cheats" broke his wrist and had to receive 40 to 50 stitches on his face – last November.

In April, a source told ET that Underwood was "at the top of his game". About five months later, Underwood is more than busy – she is waiting for the second baby number with her husband, Mike Fisher. Sunday night football, and dropped his last album, Cry Pretty, Friday.

Here's more about the fall of Underwood: