Feb 04, 2020 at 2:02 pm

Finneas O'Connell Reveals the Secret Sounds Mixed Into Sister Billie Eilish's Hit Songs - Watch Here!

Finneas is revealing the secrets behind his music with his sister, Billie Eilish!

While making an appearance on The Tonight Show Starring Jimmy Fallon on Monday night (February 3), the 22-year-old Grammy-winning songwriter-producer identified random real-life sounds hidden in their biggest songs, “Bury A Friend” and “Bad Guy.”

PHOTOS: Check out the latest pics of Finneas

“I mean, because computers and everything have gotten so much cheaper and more accessible, I feel like a lot of music producers have the same toolbox. And I think like to me, as a producer, I always want something to set my stuff apart,” Finneas said before Fallon played for the audience a drill sound Eilish recorded at the dentist that Finneas then put into her song “Bury a Friend.”

For his entry labeled “crosswalk,” Finneas shared that the sound came from the noise that played while pressing a crosswalk button in Australia. “That’s just, every time you cross a street in Australia, you hear that,” he told Jimmy, revealing that the rhythmic sound was later used in the chorus of their song “Bad Guy.”

Finneas also teased that his James Bond theme song with Billie is dropping “very very soon” and hit the main stage to perform his own song, “Let’s Fall in Love for the Night” – Watch more after the cut here!