Oh, dear.

John Lennon briefly converted to Christianity in 1977 after becoming a fan of televangelists, including Oral Roberts and Pat Robertson. Lennon was inspired to write a song called "Amen", which was his musical version of "The Lord's Prayer". He also took his family to an Easter Sunday service. 

However, Lennon's religious views were complex, and he also said things that could be interpreted as critical of Christianity.