On Saturday night we saw Lucy beat Karl Loxley in the battle rounds, winning a spot on Team Will in the next stages.
Speaking at the weekend, Lucy revealed how Will was left fascinated by her operatic voice in training for the battles.
She recalled: "During one rehearsal he stopped me and was like, ‘I don’t know how you do that. It’s like you have speakers in your mouth. Where are you singing from, how are you even breathing?’ He never gave me anything to change, he just enjoyed it.
“I was singing in a different language, so he couldn’t understand a word, but he always gave me positive feedback, telling me about the feelings he was getting.
“He said, ‘I’m getting images of birds flying and naked angels bathing. I’m in this other world when you sing’.
“I was like, ‘OK, that’s not what the song is about but it’s good that it’s giving you an escape’. You want people to connect to what you sing.”
In an interview with The Sun newspaper, Lucy said how Black Eyed Peas star Will had vowed to help "crack the code of classical music" with her.
She explained: “Will loves the style, but he told me that nobody has worked out how to make it relevant and worthy of being aired on the radio.
“He said that he was going to try and do that with me. When he said that, I was stunned."
Meanwhile, the battle wasn't the end of the road for Lucy's rival Karl, who was stolen by Sir Tom Jones for his own team in the knockouts.
The Voice continues this weekend with the second half of the battle round performances.
Browse pictures of last weekend's battles below...