Eilish performed the stark rendition with Finneas accompanying on the piano as a slideshow of the Hollywood actors, producers and other film industry figures was shown.
Among those honoured was late NBA star Kobe Bryant, who was one of nine people killed in a helicopter crash earlier this month.
Eilish’s Oscars performance followed her success at the 2020 Grammy Awards, where she became the youngest-ever person to sweep the four major categories: Song of the Year, Record of the Year, Album of the Year and Best New Artist.
Fans on social media praised the “Yesterday” cover as “beautiful”, “gorgeous” and “stunning”.
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