The former Years & Years singer will represent the UK at the Eurovision Song Contest later this year.
The Israeli broadcaster has said it would rather withdraw from Eurovision than make changes to its competing song.
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This year's festive chart battle includes classics from Wham!, Mariah Carey and The Pogues – as well as a new song by Eurovision's Sam Ryder.
A TikTok video posted by the singer appeared to hold the answers.
“The Eurovision Song Contest remains a non-political event that unites audiences worldwide through music.”
“I’m determined to give it everything I’ve got and put on an excellent and unforgettable performance for you all!”
Next year marks the 50th anniversary of ABBA's Eurovision victory – with the contest also returning to Sweden in 2024.