Yoko Ono, Hugh Jackman help launch UNICEF's latest campaign

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Yoko Ono, Hugh Jackman help launch UNICEF's latest campaign
Australian actor Hugh Jackman speaks during the global launch of the UNICEF IMAGINE project and to mark the 25th Anniversary of the Convention on the Rights of the Child, the 60th Anniversary of UNICEFs Goodwill Ambassador Programme and the 35th anniversary of the Music for UNICEF concert, at the United Nations in New York on November 20, 2014. AFP PHOTO/Jewel Samad (Photo credit should read JEWEL SAMAD/AFP/Getty Images)
Japanese multimedia artist, singer, and peace activist Yoko Ono (C) is greeted by Australian actor Hugh Jackman on stage during the global launch of the UNICEF IMAGINE project and to mark the 25th Anniversary of the Convention on the Rights of the Child, the 60th Anniversary of UNICEFs Goodwill Ambassador Programme and the 35th anniversary of the Music for UNICEF concert, at the United Nations in New York on November 20, 2014. AFP PHOTO/Jewel Samad (Photo credit should read JEWEL SAMAD/AFP/Getty Images)
NEW YORK, NY - NOVEMBER 20: Steve Harvey speaks on stage at the UNICEF launch of the #IMAGINE Project to celebrate the 25th Anniversary of the rights of a child at United Nations on November 20, 2014 in New York City. (Photo by Jemal Countess/Getty Images for UNICEF)
Japanese multimedia artist, singer, and peace activist Yoko Ono speaks during the global launch of the UNICEF IMAGINE project and to mark the 25th Anniversary of the Convention on the Rights of the Child, the 60th Anniversary of UNICEFs Goodwill Ambassador Programme and the 35th anniversary of the Music for UNICEF concert, at the United Nations in New York on November 20, 2014. AFP PHOTO/Jewel Samad (Photo credit should read JEWEL SAMAD/AFP/Getty Images)
Brazilian singer Daniela Mercury performs during the global launch of the UNICEF IMAGINE project and to mark the 25th Anniversary of the Convention on the Rights of the Child, the 60th Anniversary of UNICEFs Goodwill Ambassador Programme and the 35th anniversary of the Music for UNICEF concert, at the United Nations in New York on November 20, 2014. AFP PHOTO/Jewel Samad (Photo credit should read JEWEL SAMAD/AFP/Getty Images)
Swedish pop singer Laleh performs during the global launch of the UNICEF IMAGINE project and to mark the 25th Anniversary of the Convention on the Rights of the Child, the 60th Anniversary of UNICEFs Goodwill Ambassador Programme and the 35th anniversary of the Music for UNICEF concert, at the United Nations in New York on November 20, 2014. AFP PHOTO/Jewel Samad (Photo credit should read JEWEL SAMAD/AFP/Getty Images)
Australian actor Hugh Jackman speaks during the global launch of the UNICEF IMAGINE project and to mark the 25th Anniversary of the Convention on the Rights of the Child, the 60th Anniversary of UNICEFs Goodwill Ambassador Programme and the 35th anniversary of the Music for UNICEF concert, at the United Nations in New York on November 20, 2014. AFP PHOTO/Jewel Samad (Photo credit should read JEWEL SAMAD/AFP/Getty Images)
Japanese multimedia artist, singer, and peace activist Yoko Ono speaks during the global launch of the UNICEF IMAGINE project and to mark the 25th Anniversary of the Convention on the Rights of the Child, the 60th Anniversary of UNICEFs Goodwill Ambassador Programme and the 35th anniversary of the Music for UNICEF concert, at the United Nations in New York on November 20, 2014. AFP PHOTO/Jewel Samad (Photo credit should read JEWEL SAMAD/AFP/Getty Images)
NEW YORK, NY - NOVEMBER 20: Hugh Jackman and Deborra-Lee Furness speak on stage at the UNICEF launch of the #IMAGINE Project to celebrate the 25th Anniversary of the rights of a child at United Nations on November 20, 2014 in New York City. (Photo by Jemal Countess/Getty Images for UNICEF)
NEW YORK, NY - NOVEMBER 20: Dena Kaye speaks on stage at the UNICEF launch of the #IMAGINE Project to celebrate the 25th Anniversary of the rights of a child at United Nations on November 20, 2014 in New York City. (Photo by Jemal Countess/Getty Images for UNICEF)
NEW YORK, NY - NOVEMBER 20: The overall general view at the UNICEF launch of the #IMAGINE Project to celebrate the 25th Anniversary of the rights of a child at United Nations on November 20, 2014 in New York City. (Photo by Jemal Countess/Getty Images for UNICEF)
NEW YORK, NY - NOVEMBER 20: (L-R) Hugh Jackman, Deborra-Lee Furness and Tony Lake speak on stage at the UNICEF launch of the #IMAGINE Project to celebrate the 25th Anniversary of the rights of a child at United Nations on November 20, 2014 in New York City. (Photo by Jemal Countess/Getty Images for UNICEF)
NEW YORK, NY - NOVEMBER 20: Singer Bjorn Ulvaeus speaks on stage at the UNICEF launch of the #IMAGINE Project to celebrate the 25th Anniversary of the rights of a child at United Nations on November 20, 2014 in New York City. (Photo by Jemal Countess/Getty Images for UNICEF)
NEW YORK, NY - NOVEMBER 20: Actress Kelly Rutherford attends the UNICEF launch of the #IMAGINE Project to celebrate the 25th Anniversary of the rights of a child at United Nations on November 20, 2014 in New York City. (Photo by Jemal Countess/Getty Images for UNICEF)
US entertainer Steve Harvey and his wife arrive to attend the global launch of the UNICEF IMAGINE project at the United Nations in New York on November 20, 2014. The IMAGINE project is a musical and technological initiative helping to highlight the challenges children face the world over, and raise funds for UNICEFs work in more than 190 countries and territories. AFP PHOTO/Jewel Samad (Photo credit should read JEWEL SAMAD/AFP/Getty Images)
Swedish songwriter, producer Bjorn Ulvaeus and singer Laleh arrive to attend the global launch of the UNICEF IMAGINE project and to mark the 25th Anniversary of the Convention on the Rights of the Child, the 60th Anniversary of UNICEFs Goodwill Ambassador Program and the 35th anniversary of the Music for UNICEF concert, at the United Nations in New York on November 20, 2014. The IMAGINE project is a musical and technological initiative helping to highlight the challenges children face the world over, and raise funds for UNICEFs work in more than 190 countries and territories. AFP PHOTO/Jewel Samad (Photo credit should read JEWEL SAMAD/AFP/Getty Images)
Swedish pop singer Laleh performs during the global launch of the UNICEF IMAGINE project and to mark the 25th Anniversary of the Convention on the Rights of the Child, the 60th Anniversary of UNICEFs Goodwill Ambassador Programme and the 35th anniversary of the Music for UNICEF concert, at the United Nations in New York on November 20, 2014. AFP PHOTO/Jewel Samad (Photo credit should read JEWEL SAMAD/AFP/Getty Images)
Brazilian singer Daniela Mercury performs during the global launch of the UNICEF IMAGINE project and to mark the 25th Anniversary of the Convention on the Rights of the Child, the 60th Anniversary of UNICEFs Goodwill Ambassador Programme and the 35th anniversary of the Music for UNICEF concert, at the United Nations in New York on November 20, 2014. AFP PHOTO/Jewel Samad (Photo credit should read JEWEL SAMAD/AFP/Getty Images)
NEW YORK, NY - NOVEMBER 20: Actor Hugh Jackman speaks on stage at the UNICEF launch of the #IMAGINE Project to celebrate the 25th Anniversary of the rights of a child at United Nations on November 20, 2014 in New York City. (Photo by Jemal Countess/Getty Images for UNICEF)
US entertainer Steve Harvey and his wife arrive to attend the global launch of the UNICEF IMAGINE project at the United Nations in New York on November 20, 2014. The IMAGINE project is a musical and technological initiative helping to highlight the challenges children face the world over, and raise funds for UNICEFs work in more than 190 countries and territories. AFP PHOTO/Jewel Samad (Photo credit should read JEWEL SAMAD/AFP/Getty Images)
Swedish pop singer Laleh performs during the global launch of the UNICEF IMAGINE project and to mark the 25th Anniversary of the Convention on the Rights of the Child, the 60th Anniversary of UNICEFs Goodwill Ambassador Programme and the 35th anniversary of the Music for UNICEF concert, at the United Nations in New York on November 20, 2014. AFP PHOTO/Jewel Samad (Photo credit should read JEWEL SAMAD/AFP/Getty Images)
NEW YORK, NY - NOVEMBER 20: Kelly Rutherford attends the UNICEF launch of the #IMAGINE Project to celebrate the 25th Anniversary of the rights of a child at United Nations on November 20, 2014 in New York City. (Photo by Michael Loccisano/Getty Images for UNICEF)
NEW YORK, NY - NOVEMBER 20: H.E. Sebastiano Cardi speaks on stage at the UNICEF launch of the #IMAGINE Project to celebrate the 25th Anniversary of the rights of a child at United Nations on November 20, 2014 in New York City. (Photo by Michael Loccisano/Getty Images for UNICEF)
NEW YORK, NY - NOVEMBER 20: Model Andreja Pejic attends the UNICEF launch of the #IMAGINE Project to celebrate the 25th Anniversary of the rights of a child at United Nations on November 20, 2014 in New York City. (Photo by Michael Loccisano/Getty Images for UNICEF)
NEW YORK, NY - NOVEMBER 20: Jackie Evancho attends the UNICEF launch of the #IMAGINE Project to celebrate the 25th Anniversary of the rights of a child at United Nations on November 20, 2014 in New York City. (Photo by Michael Loccisano/Getty Images for UNICEF)
NEW YORK, NY - NOVEMBER 20: Singer Daniela Mercury attends the UNICEF launch of the #IMAGINE Project to celebrate the 25th Anniversary of the rights of a child at United Nations on November 20, 2014 in New York City. (Photo by Michael Loccisano/Getty Images for UNICEF)
NEW YORK, NY - NOVEMBER 20: Menchi Barriocanal attends the UNICEF launch of the #IMAGINE Project to celebrate the 25th Anniversary of the rights of a child at United Nations on November 20, 2014 in New York City. (Photo by Michael Loccisano/Getty Images for UNICEF)
NEW YORK, NY - NOVEMBER 20: Bjorn Ulvaeus attends the UNICEF launch of the #IMAGINE Project to celebrate the 25th Anniversary of the rights of a child at United Nations on November 20, 2014 in New York City. (Photo by Michael Loccisano/Getty Images for UNICEF)
NEW YORK, NY - NOVEMBER 20: Thomas Gobena attends the UNICEF launch of the #IMAGINE Project to celebrate the 25th Anniversary of the rights of a child at United Nations on November 20, 2014 in New York City. (Photo by Michael Loccisano/Getty Images for UNICEF)
NEW YORK, NY - NOVEMBER 20: Andreja Pejic (L) and Kelly Rutherford attend the UNICEF launch of the #IMAGINE Project to celebrate the 25th Anniversary of the rights of a child at United Nations on November 20, 2014 in New York City. (Photo by Jemal Countess/Getty Images for UNICEF)
NEW YORK, NY - NOVEMBER 20: Steve Harvey speaks on stage at the UNICEF launch of the #IMAGINE Project to celebrate the 25th Anniversary of the rights of a child at United Nations on November 20, 2014 in New York City. (Photo by Michael Loccisano/Getty Images for UNICEF)
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By EMILY CEGIELSKI

UNICEF celebrated the 25th anniversary of the Convention on the Rights of the Child with a concert, featuring performers from around the world, at the UN General Assembly on Thursday. Yoko Ono, Hugh Jackman, Steve Harvey and a slew of other celebrities were on hand for the musical celebration and to help launch the organization's new #IMAGINE campaign.

"Twenty-five years ago the Convention on the Rights of the Child asked us all to imagine a better world for children and, not only to imagine it, but to make that vision real," UNICEF Executive Director Anthony Lake explained. "And today, we celebrate the wonderful progress that has been achieved, but we also need to recall all the millions of children that we have not reached."

#IMAGINE is how UNICEF hopes to reach those kids that have been left behind.

Using the John Lennon classic as an anthem, the organization has challenged people across the globe to record their own version of the song using a newly-released smartphone app. These individual recordings, along with those from well-known singers, will then be produced by David Guetta into one multilingual, 'world' version of 'Imagine.'

UNICEF is calling it the 'largest ever global sing-along,' and plans to release the song with an interactive music video in the lead-up to New Year's Eve.

The initiative promises to have a lot of participation from celebrities. Seth Green, Katy Perry and Lorde all made appearances in a video shown at Wednesday's event, and Hugh Jackman and Steve Harvey waxed poetically about the campaign in front of attendees.

"All children everywhere have the same rights -- no matter where they or what they believe," Jackman remarked before bringing Yoko Ono on stage. Ono, who gave UNICEF the rights to use Lennon's song, seemed thrilled with the collaboration. Saying that the future was now, she urged everyone to "seek peace, act peace and spread peace."

Speaking with AOL.com before the concert, Harvey pondered, "What would happen if the word 'imagine' was erased? What if there was no imagination? Albert Einstein said once that imagination is a preview to life's coming attractions. So, if there is no 'imagine,' then where are we at?"

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