The event was streamed on the UN's YouTube channel and began on Saturday with a pre-recorded appearance by the k-pop giants BTS in Seoul in South Korea, before it was time for Elton John to step on stage in Paris.
Billie Eilish was one of the artists who appeared on stage in Central Park in New York and she sent an invitation to US President Joe Biden.
- Next week, the US Congress will vote to introduce the strongest climate laws in US history!
It would send a powerful message to leaders and legislators around the world and pave the way for the United States to reduce emissions in the country.
President Biden must deliver here, said Billie Eilish.
15 years since last
During the climate concert, the hip-hop group The Fugees was also reunited for the first time in 15 years.
In a video, recorded in New York on Wednesday, Lauryn Hill, Wyclef Jean and Pras Michel perform the trio's mega-hit from 1996 - "Ready or not".
The reunion takes place after the band recently announced that they are going on an international tour to celebrate the 25th anniversary of the album "The score".
Metallica, Paul Simon, Doja Cat, Andrea Bocelli and the Black Eyed Peas are some of the other bands and artists who performed at the event.