Lydia made it through to the final of The Voice 2016 yesterday evening after wowing with a cover of I'll Be There, including self-penned lyrics about her late sister.
In a chat with the Sunday Mirror, Lydia has spoken about the death of her older sibling, called Lucy, who passed away at just nine years old.
Adding Lucy to her own name in memory, Lydia told how her sister was given just an hour to live after being born with spina bifida but fought back against the condition to defy the odds.
Lydia performed last night in tribute to Lucy, who would have celebrated her birthday this week.
“Even though we never met I feel like I know so much about her that we would have been the best of friends," Lydia revealed. “I took on her name when I was 16 because I feel that she’s part of me.
"And, as strange as this sounds, I feel her aura is always around me, willing me to do well.”
The 22-year-old singer from Essex continued: "I had to pay tribute this week because of her birthday.
"So I sat in the apartment we’re all staying in for the show, lay on the bed and wrote some new lyrics. She’s never far from my thoughts. The big sister I never knew.”
Lydia, who carries a picture of Lucy with her everywhere, went on to say how her sister was also into singing.
She concluded: “No matter what happens on the show Lucy has given me the determination to keep going because she was such a fighter.”
The Voice UK final airs next Sunday night on BBC One.