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John Lennon Radio

John Lennon's "Imagine" has been a source of inspiration for people all over the world. It is, without a doubt, one of the most iconic and legendary pieces of music, originally released in the early '70s. Fast forward to 2014 and the world's biggest stars in music are covering the song for a good cause. 

Celebrating the 25th anniversary of the United Nations on the Rights of the Child, UNICEF has come together with Yoko Ono and David Guetta for the #IMAGINE project, which is the world's biggest sing-along. The project is meant to raise awareness for UNICEF.

The video features stars like Katy Perry, will.i.am, Lance Bass, Nicole Scherzinger, David Guetta, Adam Lambert, Cody Simpson, Idris Elba, Rumer Willis, Taye Diggs, Seth Green, Nina Dobrev, and a ton more.

Check it out below:

The second part of this sing-along is, through a free downloadable app, anyone can record and upload their own version of "Imagine," along with what they imagine a better world for kids to be. Those recordings will then be compiled - along with the celeb recordings - by David Guetta to make one track which will be debuted on the first day of 2015 (January 1).