The singer-songwriter revealed that several fans have told her that her open sexuality has helped them come out to their own families.
"It's been amazing. I've done gigs and some young girls there said they were watching TV with their parents, they heard my music, their parents loved it, found out I was gay, still loved it and they've said, 'Oh, I'm gay as well', and their parents have been fine," she told The Sun.
"For me, to have helped someone come out is the biggest compliment ever."
The 21-year-old reached the Judges' Houses stage of the competition on last night's (September 23) show after her performance of her self-penned track 'Tea and Toast'.
On the inspiration behind the track, she said: "I was busking in town and this elderly couple walked past holding hands. Then the lady collapsed in the street and was unconscious.
"And the look on the husband's face was like he'd never lost her before and he'd just lost her then.
"It was horrible and it inspired me to write a song — after I got them into an ambulance."
Lucy Spraggan scored a hit single with her track 'Last Night' in August before it was removed from iTunes as per X Factor rules.
Watch Lucy Spraggan perform 'Tea and Toast' below: