The familiar Sydney sound spliced into Billie Eilish's Bad Guy

Artist revealed last year that the chorus of her Grammy award winning song, which also topped the Triple J listener poll, used a sample of Sydney traffic light sounds

If you listened carefully, you might just have heard it. Sitting underneath the pulsating chorus of Billie Eilish's Grammy award-winning smash hit, Bad Guy, there is a familiar sound for many Australians: the rapid tick you will hear at a pedestrian crossing when the light turns green.

The 18-year-old, who was the big winner at this year's Grammys, picking up gongs including best new artist, album of the year and song of the year, revealed she used the Australian-themed sample in an interview with Rolling Stone late last year.