The 29-year-old Florence + the Machine singer said "Wish That You Were Here" was a tune she wrote detailing her feelings about her friends and loved ones, who she hadn't seen for months.
And when director Burton and his team approached her and asked if she could contribute a song to the soundtrack of his new film, she felt the track she wrote in the back of a tour bus would be perfect, reported Billboard.
"It's amazing, but it comes at a cost - a cost of leaving the people you love behind for a year or two. You kind of feel like if you could sing a song into the wind and maybe the wind could take it to them in a way that you can't with a text or a call.
"You just want to send your love in a different way, in a way to somehow reach the unreachable."
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