The singer explained that her former X Factor mentor praised her new song 'You Bring Me Joy', which was released in the UK earlier this week.
"She's a fan of the song. She was annoyed I didn't ring when I was in LA for the video," Lily told the Daily Star.
The 17-year-old also admitted that she chose to work with Xenomania on the track as she wanted to give the public something unexpected with her debut.
"I wanted to show people I'm not just a rock chick," Lily added.
The star's debut single 'You Bring Me Joy' is currently on course to claim the UK chart top-spot on Sunday (September 16).
Watch the music video for Amelia Lily's 'You Bring Me Joy' below: