'Hello' Friend: Adele Has Emotional Reaction To Seeing Critically Acclaimed Singer In Audience

Singer Adele was stunned to witness a legendary diva in the audience of her Las Vegas residency!

The "Chasing Pavements" singer has a well-documented love for music, (she recently delighted Sabrina Carpenter after the pop star learned Adele enjoys her smash, "Espresso"), and it was on full display last night during her show at The Colosseum at Caeser's Palace when she witnessed a certain singer watching the show.

The "Send My Love (To Your New Lover)" singer was visibly moved when she spotted Celine Dion enjoying herself in the audience of her Saturday night engagement.

Dion, 56, has faced heartbreaking health issues as of late. The "My Heart Will Go On" singer brought cameras into her life for the Amazon Prime documentary, "I Am: Celine Dion."

Dion recently revealed her nearly two-decade struggle with stiff person syndrome last year.

Despite her debilitating health struggles, Dion's recovery has led her to enjoy herself! The singer's weekend plans have included a Saturday night show in Las Vegas; she surprised Adele, who is in the midst of a residency in the city of lights!

According to TMZ, Adele was belting out her massive hit "When You Were Young" when her eye caught Dion in the audience.

Adele made her way over to Dion as tears were shed. The giant crowd was also able to shower Dion with appreciation, and enthusiastic fans gave the "That's The Way It Is" singer a standing ovation!

Tickets for Adele's upcoming November shows are now available. The eight shows are the final nights of her residency.

Stiff Person Syndrome has greatly impacted Dion's daily life and has kept her from being able to sing. As she is on the road to recovery, Dion has revealed returning to singing is one of her biggest goals.

Last Summer, the "I'm Alive" singer sat down with the hosts of the TODAY show to discuss her 17-year battle with Stiff Person Syndrome. In the trailer for her appearance, Dion tearfully revealed she initially overlooked the symptoms of the disorder.

"We did not know what was going on [with me]. I did not take the time... I should have stopped and took the time to figure it out. And like it wasn't enough, my husband as well is fighting for his own life," she said, of her late husband René Angélil, who passed away in 2016 after a battle with throat cancer.

As Dion navigated her then-undiagnosed symptoms, she kept her struggles quiet from her fans and the general public.

"I had to raise my kids, I had to hide, I had to try to be a hero—while feeling my body leaving me," she explained via the Daily Mail, as previously reported by The Blast. "I was holding on to my own dreams," Dion shared to the publication.

The singer soon became too overwhelmed with guarding her life-changing secret. She shared the internal pain she felt while keeping the disorder's effect a secret.

"Lying for me was...The burden was too much. Lying to the people who got me to where I am today, I could not do it anymore," Dion explained to Hoda Kotb.

Dion's body gave an in-depth explanation of how her body involuntarily affects her life. The disorder leaves the singer dealing with "muscle spasms" which make singing quite difficult. Dion has difficulty controlling her pitch due to the spasms.

"It's like somebody is strangling you," she went on. "Like somebody is pushing your larynx/pharynx."

The rest of her body is also affected by the muscle spasms. "The spasms can also be in the abdominal, spine, or ribs," Dion described.

"If I point my feet, they will stay [stuck in that position], or if I cook - because I love to cook - my fingers, my hands, will get in a position. My feet - it's [like] cramping, but it's like [they get] in a position, and you cannot unlock them," she shared.

In an emotional Instagram post, the "Power of Love" singer shared her goal of returning to the stage with her fans, sharing how much she is determined to maintain a sense of normalcy.

Dion also shared how "grateful" she has been for the support since announcing her diagnosis. She also was adamant in providing encouragement to her fellow Stiff Person Syndrome survivors.

"I want to send my encouragement and support to all those around the world that have been affected by SPS. I want you to know you can do it. We can do it," Dion concluded her post.