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Classic Halloween moviesare a great way to kick off the spooky season leading up to Halloween.
She sang alongside Danny Elfman as Jack Skellington and Ken Page, who reprised his role as Oogie Boogie.
A full orchestra accompanied Eilish as she sang Sallys Song in a Sally-inspired costume.
Eilishshowed off her Halloween costumeearlier in October at Doja Cats Halloween birthday party.
Eilish has had an exciting year so far, fromher sophomore album debuting at No.
1, tocreating a Bond song, towinning album of the year at the Grammys.
