What song does Ozzy refer to in his song "Dreamer"  that was written by John Lennon, that encourages a world at peace?
Imagine (John Lennon song) "Imagine" is a song written and performed by English musician John Lennon. The best-selling single of his solo career, its lyrics encourage the listener to imagine a world at peace without the barriers of borders or the divisions of religion and nationality, and to consider the possibility that the whole of humanity would live unattached to material possessions.
Pipes of Peace Pipes of Peace is the fourth studio album by English singer-songwriter Paul McCartney using his own name, released in 1983. As the follow-up to the popular "Tug of War", the album came close to matching the commercial success of its predecessor in Britain but peaked only at number 15 on America's "Billboard" 200 albums chart. While "Pipes of Peace" was the source of international hit singles such as "Say Say Say" (recorded with Michael Jackson) and the title track, the critical response to the album was less favourable than that afforded to "Tug of War".