Goo Goo Dolls lead singer John Rzeznik was hospitalized with pneumonia and canceled a series of concerts in South Africa.

Wearing a blue medical gown and black Herschel hat, the "Slide" singer apologized to fans for having to postpone the shows in a video captured from what appeared to be his room in a hospital.

The popular '90s rock band was scheduled to perform in South Africa from Dec. 4-7.

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"Hey everybody, it's John from the Goo Goo Dolls," Rzeznik said from his bed in the video posted to social media. "I'm truly sorry that I cannot be there, but I wound up going to a doctor, and I have pneumonia. And they checked me into a hospital. And I'm stuck here for a day or two.

"We're working on getting back down there as fast as we can, and I will keep you informed about that. I'm just really sorry that we couldn't do this. I apologize that this happened. We'll come down there, we'll make it up to you guys.

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"Thanks for being patient."

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Following his video message, updated tour dates flashed across the screen for the end of March.

On Instagram, the band posted, "We’re heartbroken to postpone our South Africa shows. This country means so much to us, and we were so excited to create more memories with you. Sadly, my doctor has advised rest and recovery. Thank you for your understanding — we’ll make it worth the wait when we return in March 2025!"

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The Goo Goo Dolls found mainstream success with the 1995 release of their breakthrough single, "Name," from their fifth studio album. Three years later, "Iris," written for the Nicolas Cage film "City of Angels," earned the group accolades and spent nearly a dozen weeks on the Billboard Hot 100.

Since releasing their sixth studio album, "Dizzy Up the Girl" in 1998, the band has sold millions of albums worldwide and has continued to tour. 

In April 2025, the Goo Goo Dolls will join Zach Bryan, Luke Combs, Jelly Roll, Ashley McBryde and Lana Del Rey at the Stagecoach Country Music Festival in Indio, Calif.

Queen Camilla's ongoing chest infection continues to affect her royal duties. 

On Tuesday, Her Majesty, who reduced her duties for the Qatar state visit this week as she recovers, told guests at the Buckingham Palace festivities her recent illness developed into a form of pneumonia, according to People.

The Queen, who did not attend the traditional kickoff at Horse Guards Parade in London Tuesday morning, was driven to the palace in the afternoon for the luncheon welcoming Sheikh Tamim bin Hamad Al Thani, the amir of Qatar, and his wife, Her Highness Sheikha Jawaher bint Hamad bin Suhaim Al Thani, the outlet reported. 

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King Charles, Kate Middleton and Prince William were all in attendance to welcome the amir of Qatar. 

A representative for Buckingham Palace did not immediately respond to Fox News Digital's request for comment. 

On Nov. 5, Her Majesty was advised to take a "short period of rest," effectively canceling Camilla's events for that week. 

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"Her Majesty The Queen is currently unwell with a chest infection, for which her doctors have advised a short period of rest," a statement from the palace said, according to the BBC.

The royal family has been dealing with multiple health scares. Buckingham Palace announced King Charles III had been diagnosed with cancer in February, while Middleton announced her own cancer diagnosis one month later. 

Kate Middleton had undergone planned abdominal surgery, and it was determined her condition was "non-cancerous." However, further testing showed "cancer had been present." She was advised to begin chemotherapy by her medical team.

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"This, of course, came as a huge shock, and William and I have been doing everything we can to process and manage this privately for the sake of our young family," the Princess of Wales said in a prerecorded message in March. "As you can imagine, this has taken time. It has taken me time to recover from major surgery in order to start my treatment. But, most importantly, it has taken us time to explain everything to George, Charlotte and Louis in a way that is appropriate for them, and to reassure them that I am going to be OK."

His Majesty returned to his royal duties in April, while Middleton, who revealed she was cancer-free in September, has slowly begun her return. 

Fox News Digital's Lauryn Overhultz contributed to this post.