Keith Urban, John Legend and more sing 'Imagine' at Tokyo Olympics opening ceremony

After a year-long delay, athletes from around the world came together on Friday to officially kick off the Tokyo Summer Olympic Games.

But there was one performance in particular from the opening ceremony that stole the show ...

Musicians from around the world joined together for a spinetingling pre-recorded performance of the John Lennon and Yoko Ono classic 'Imagine.'

The surprise appearance saw Keith Urban belting out the iconic song alongside John Legend, Angélique Kidjo and Alejandro Sanz.

Hans Zimmer composed the performance, which began in Tokyo with Suginami Children’s Choir before featuring remotely recorded performances from Urban and company.

Yoko Ono backed the performance via Twitter.

"John and I were both artists and we were living together, so we inspired each other," Ono posted on Friday following the opening ceremony.

"The song 'Imagine' embodied what we believed together at the time. John and I met – he comes from the west and I come from the east – and still we are together."

And the song boasts a long history with the Olympics.

Stevie Wonder performed the song during the 1996 Games in Atlanta; it appeared again in 2006, 2012 and '18 with different artists offering renditions.