Olivia Rodrigo has already surprised Jimmy Kimmel's kids on their way to school, but this time she turns her attention to some unsuspecting trick-or-treaters.
In the clip above the singer answers the front door of a random house to various groups of candy-seeking children, asking them who their favourite singer is before revealing herself or testing their Olivia Rodrigo song knowledge for candy prizes.
The highlight? One little boy who literally has a proper open-mouthed reaction.
Topics Jimmy Kimmel Live
