One of world’s most celebrated musicians and founder of the famous rock band the Beatles’, John Lennon has long been an inspiration for many, thanks to his moving compositions that often spoke about humanity and peace. Lennon’s popular composition ‘Imagine’, which is considered to be one of his best compositions to date, moved a number of celebrities and UNICEF to start a campaign named after the song to raise awareness about the challenges and problems faced by millions of children worldwide.

Lennon’s wife and global UNICEF Goodwill ambassador Yoko Ono, was also present at the event, alongside A-list celebrities Hugh Jackman and ABBA’s Björn. “A dream you dream alone may be a dream, but a dream two people dream together is a reality,” said Ono, as reported by the Daily Mail.

The launch of the campaign included a video of Lennon’s ‘Imagine’ featuring cameos by over a 100 people including actors, musicians, sports personalities, dignitaries and children’s choirs. Katy Perry, Courtney Cox, Priyanka Chopra, Adam Lambert and Lance Bass were among the celebrities that were seen singing alongside clips of Lennon performing.

Part of the project includes a digital app made by TouchCast, which allows people to record their own versions of the song. Some of these performances will be compiled at a later date with versions from other artists and UNICEF ambassadors to make a multilingual ‘world’ mix produced by none other than the famed DJ and composer David Guetta. Users have also been encouraged to record personal messages via the app describing their vision of a better world for children that could make the cut for an accompanying interactive music video due to be released in December.

“I’m really excited to be working with UNICEF on this incredible new project. Our ‘world’ version of ‘Imagine’ will be like no other – I am proud to be a part of this collaboration. We have to get the word out that every voice counts and every child counts, too,” Guetta said in a statement to the press.