Billie Eilish chats with ET's Denny Directo at the premiere of her concert film, 'Hit Me Hard and Soft: The Tour (Live in 3D),' in theaters on May 8. The singer reacts to going full fangirl during Justin Bieber's Coachella set, where she was brought on stage during 'One Less Lonely Girl.' She also reacts to having a 'Survivor' immunity idol named in her honor.
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