Chris Martin has been praised as a "legend" after surprising a Ukrainian singer performing near his show.
Romario Punch was left stunned after he was approached by the songwriter while he was singing in the street.
But the musician had another surprise in store, as the Coldplay frontman invited him to come along to the band's concert and join him onstage.
In what many fans are calling the highlight of the night, the band and their new friend then gave a "moving" performance during Coldplay's first show in Poland in several years.
Singer Romario captured the "amazing" moment he met the singer on camera, in a video that has racked up two million views in the day since it was posted.
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Posting to TikTok as @ romario_punch he wrote: "I was singing at the street when Coldplay frontman Chris Martin invite me to the stadium."
The clip then shows the moment Chris approaches Romario with the special invite, in the middle of a street performance he was giving outside the stadium in Warsaw.
And the video cuts to show a very-excited Romario enjoying the show.
A second TikTok then shows Romario smiling as he prepares for the performance, before taking to the stage with the band.
Together, the musicians performed the popular Ukrainian song Obijmy, created by the band Okean Elzy, according to Poland Posts English.
The website reports Chris told the crowd he had spent his visit to Poland meeting Ukrainian people now living there.
He added: " Ukraine is not alone," before the band dedicated a song to the country.
Fans were left in tears by the gesture, with many quick to praise Chris' kindness and Romario's talent, sharing how much the performance meant to them.
One comment said: "Bro I actually CRIED my eyes out when you were singing, such a moving performance."
Another wrote: "When you started singing the whole stadium just held the breath! It was amazing!"
And a third added: "Well done such an honour for you and Ukraine. Wow! Chris is so humble. Such a lovely gesture."
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