Billie Eilish and brother Finneas admit they had their 'longest, biggest argument' while making Hit Me Hard And Soft as they eat spicy wings

Billie Eilish and her music collaborator brother Finneas O'Connell opened up about their biggest conflicts on the latest episode of Hot Ones Versus.

On the Tuesday show, the 22-year-old pop star — who recently shared a bikini snap on Instagram — revealed about her sibling, 26, 'He;s a lot of times barefoot, a lot of the times in very filthy shoes.'

She demonstrated how Finneas tends to kick his feet up on the soundboard while they're in the music studio.

'My face is right there. And actually we filmed so much in making the album that almost all the footage is his feet and then me,' she said about the process of creating her latest album Hit Me Hard And Soft.

Her brother added, 'I think the longest, biggest argument was during a period of transition in maybe both of our lives where we were just trying to be kind of honest.'

Billie Eilish and her music collaborator brother Finneas O'Connell opened up about their biggest conflicts on the latest episode of Hot Ones Versus

Billie Eilish and her music collaborator brother Finneas O'Connell opened up about their biggest conflicts on the latest episode of Hot Ones Versus

On the Tuesday, July 9 show, the 22-year-old pop star revealed about her sibling, 26, 'He¿s a lot of times barefoot, a lot of the times in very filthy shoes'

On the Tuesday, July 9 show, the 22-year-old pop star revealed about her sibling, 26, 'He’s a lot of times barefoot, a lot of the times in very filthy shoes'

The music producer added, 'To give [Billie] credit, I was very much high and mighty about, like, "You’re not being honest or authentic enough." So I learned a lot from being too egocentric in that process.'

For their 14-minute segment, Billie was dressed in her signature look of baggy clothes.

She mixed patterns, teaming red and white plaid shorts with a green and black striped rugby shirt.

The trendsetter added another oversize layer, donning a black and beige button-up checkered shirt that she left unfastened.

Her long, straight, dark hair was worn loose and she wore a backwards black and green Jordan hat on top.

Throughout the filming, the duo ate spicy vegan chicken wings and answered questions from note cards.

The family members discussed Billie's eccentric outfits, and quizzed each other on how well they know one another.

Finneas also revealed What Was I Made For? as his favorite song of Billie's.

Throughout the filming, the duo ate spicy vegan chicken wings and answered questions from note cards

Throughout the filming, the duo ate spicy vegan chicken wings and answered questions from note cards

The family members discussed Billie's eccentric outfits, and quizzed each other on how well they know one another

The family members discussed Billie's eccentric outfits, and quizzed each other on how well they know one another

 'I love that song. That song’s great….there’s such a tender, heartbreaking thing about that song,' he said.

He continued, 'I have such a fond memory of writing it. We got to like perform it for that whole year. 

'And it got us into Barbie’s entourage, which was such a fun entourage to be a part of, they were all such cool, nice people.'

Back in May, the brother and sister were guests on The Zane Lowe Interview Series, where they also discussed their collaborative tiffs.

Finneas revealed What Was I Made For? as his favorite song of Billie's

Finneas revealed What Was I Made For? as his favorite song of Billie's

The successful siblings pictured in March with their Oscar for their song What Was I Made For? from the Barbie soundtrack

The successful siblings pictured in March with their Oscar for their song What Was I Made For? from the Barbie soundtrack

Finneas confessed to confronting Billie about her handling of the themes on their latest project. 

He explained: 'We'd been writing these fragments of stuff and I felt...I've been proven wrong over and over, but this was the jag I was on that night. 

'I was like, "Subject-wise, I'm not being led into what you're actually feeling. And I think that there are real guards up."'

O'Connell also recalled that Eilish often remained elusive about the meaning of each of her songs, and he advised her to 'say how you feel' when explaining the context behind her lyrics.