Demi Lovato's dreams came true recently as she performed an iconic song with the singer from one of the most legendary rock bands known to date; who could this be?

According to Billboard, the former Disney star performed at the Beacon Theatre in New York City for her "Holy Fvck" tour. Elsewhere in the show, fans were surprised as the singer brought out a special guest for the evening, John Rzeznik of Goo Goo Dolls.

The pair graced concertgoers with their rendition of the classic hit "Iris." Lovato took to her Instagram stories to express her feelings, saying that the collaboration was a "dream come true" for her. (watch their performance below)

On the other hand, the band shared photos on their account, writing, "Thank you to the incredible @ddlovato for inviting me to perform "Iris" live with her tonight at the @beacontheatre !!"

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Not The First Time Demi Lovato Surprised Fans With a Special Guest

In early reports, Demi Lovato also brought out a special guest when she performed at the YouTube Theater in Inglewood, California last month.

Fans were shocked when the "Substance" hitmaker called Ashlee Simpson on stage. The pair mashed up their hits "La La Land" and "La La." Both songs were released at the beginning of their careers.

According to Rolling Stone, Simpson's appearance on Lovato's tour was her first performance in three years. The last time she sang on stage was in 2019 when she was promoting her EP with her husband Evan Ross. Before that, her last tour was in 2008.

In a previous interview with Zane Lowe, the "Camp Rock" star revealed that Simpson and Kelly Clarkson are two of her inspirations for her album "Holy Fvck."

"There's also Ashlee Simpson 'LaLa,' and I was like, I want to do that. So I got inspired, and then I found bands like Paramore and Flyleaf," she said.

Demi Lovato is currently touring across North America for her tour and it appears that it would be her last as she hinted on social media last month.

She took to her stories to reveal that she was "sick" and couldn't get out of bed, saying she couldn't do it anymore. The singer then noted that this would be her last tour, but she didn't give more context behind her statement.

Lovato's next stop would be at the Charlotte Metro Credit Union Amphitheatre in Charlotte, North Carolina, on October 21.

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