Billie Eilish says she watched 'The Office' so much that she legitimately thought the Irish band U2 was from Scranton

• Billie Eilish appeared on the new episode of Angela Kinsey and Jenna Fischer's "Office Ladies" podcast.
• Eilish said she began watching "The Office" at a "young age" and didn't understand all the jokes.

"The Office" superfan Billie Eilish said that she started watching the show at such a young age that she believed many of the jokes to be true, including one about the Irish band U2 hailing from Scranton, Pennsylvania.

"Starting to watch 'The Office' at a really young age, I almost didn't understand any reference whatsoever," Eilish said while appearing as a guest on the latest episode of "The Office" costars and real-life best friends Angela Kinsey and Jenna Fischer's "Office Ladies" podcast.

NBC's "The Office," a documentary-style workplace sitcom, ran for nine seasons between 2005 and 2013. The show starred Steve Carell as Michael Scott, the regional manager of the Scranton branch of a fictional paper company called Dunder Mifflin Inc.

Eilish, who's a big fan of "The Office" and said she's watched it 30 times from start to finish on her phone, admitted that because of her age, she didn't understand "most" of the references on the show.

"There's so many that are things said, especially by Michael, in 'The Office' that he says wrong, written on purpose, that I didn't even know the real word," she explained. So, I said many words wrong because I learned them from Michael Scott."

Eilish said that the "worst" instance of her believing a joke on "The Office" to be factual happened a few months ago, involving U2. The legendary rock band is comprised of Bono, the Edge, Adam Clayton, and Larry Mullen Jr.

Bono, the frontman, has previously named Eilish's "Everything I Wanted" as one of his "songs that saved my life." Meanwhile, Eilish was part of U2's tribute video that accompanies the band being awarded a Kennedy Center Lifetime Achievement Award.

"Last June, we were in Ireland. I'm in my hotel and I get flowers delivered to my room and it has a little letter on it," she recalled "And it's this really, really sweet letter and it says 'from Bono.' And I was like, 'Why would Bono, who's from Scranton…'

"You thought Bono was from Scranton, Pennsylvania?" Kinsey asked.

"Yes," Eilish replied. "I go, 'Why would he send me something in Ireland? What does this have to do with him?' And it said, 'Welcome to my hometown' or something like that. But U2 is from Scranton. And I kept asking everyone like, 'What is Bono doing sending me flowers all the way across the world? Why would he do that?' And my friends were like, 'Billie, what are you talking about? They're Irish.' I was like 'No they're not.'"

The Grammy-winning singer said she thought U2 was from the US because of a conversation between Michael and John Krasinski's character, Jim Halpert, on season four.

In the episode titled "Goodbye, Toby Part 1," Michael, while putting together a mixtape for Holly (Amy Ryan), asked Jim: "Hey, what's the group that was from Scranton that made it big? Was that U2?"

In response, Jim said, "Yes."

Eilish said that, because the moment was played straight without a pause or a laugh, she interpreted it as Jim answering Michael's absurd question honestly.

"Here's the thing. We are going to give you our phone numbers. Any time you come up on something like this, you just text us. We are like your 'Office' aunties," Kinsey told Eilish.

Kinsey and Fischer's '"Office Ladies" podcast is from Earwolf and you can listen to the full episodes here.