Lily's as-yet-unidentified winner's single was temporarily made available to pre-order on the HMV website on Tuesday (December 6), prompting speculation that the ITV contest had somehow been fixed for her.
According to insiders, Lily has grown concerned that her fans may feel "manipulated" by the slip-up and give their backing to rivals Little Mix and Marcus Collins in this weekend's Wembley Arena final.
"She has been hurting inside," a source told the Daily Star. "Amelia is only 17 and she has been on a roller-coaster, being selected, then rejected, then being brought back again and now all this massive headache.
"It is a wonder she has managed to keep on going. She is facing a huge test of her character. Viewers hate to think they're being manipulated and the HMV row will make them think that. But, hopefully, Amelia will pull through as she wants this so, so much."
HMV assured fans that the posting of Lily's details had been down to an "unforeseen technical issue" and the potential singles of all three finalists would be made available for pre-order simultaneously.
"Nothing further should be construed from it," the company added.
Lily is believed to be suffering from laryngitis ahead of the X Factor final.
See pictures of Amelia and Marcus return to their hometowns this week below: