The I Dreamed a Dream hitmaker is to release her sixth album in November (14) and the record includes covers of classic songs, which she admits is a "risk".
Lennon's peace anthem Imagine is among those featured, and Boyle reveals the 1971 hit was the toughest to cover.
She says, "John Lennon’s Imagine was one of the hardest to record, not because of the music or the vocals but because I wanted to do his song justice. Of course the die hard Lennon fans will probably criticise, but I hope that people like my personal take on the song."
Other covers on the album include Simon & Garfunkel's Bridge Over Troubled Water and Pink Floyd's Wish You Were Here.