South Korean singer-actress IU revealed during her guest appearance on BTS' Suga's online talk show "Suchwita" that she initially wanted to collaborate with Suga's bandmate RM but did not push through it despite getting his contact details.

The 30-year-old singer is Suga's latest "Suchwita" guest. IU and Suga previously collaborated on the former's song "Eight" and the latter's song "People Pt.2."

To start the interview, Suga asked her to give more details about the first song they worked on together in 2020, "Eight." But before that, Suga admitted he wasn't IU's first choice for the joint project.

"You really want to talk about that?" IU replied before laughing. After much prodding from Suga, she continued, "At first, I asked Yoongi if I could have RM's number."

Although she got RM's number from Suga, she revealed that she never called him. IU then confessed that asking for the number of the BTS leader already took a lot of courage from her.

"I had this impulse to do this quickly. That's how I felt. But after I got his number, he's just a total stranger, so I couldn't get up the courage to just call someone I didn't know at all," she explained.

IU added, "So anyway, in the end, I never called RM. And after that, I just kind of lost interest in doing that song."

Had IU found the courage to contact RM for a collaboration song, she said that the track "would have been something really serious" because, at the time, she wasn't in the best place mentally.

"I wanted to bring out those emotions in a song," IU said of her supposed collaboration with RM.

After losing interest in the idea of the song she wanted to work on with RM, IU came up with "Eight," which she ended up doing with Suga.

Thinking it would be better to do the song with someone the same age as her, IU said it was best to do it with Suga.

"Of all the producers our age, the best is you," she said.

After "Eight," the two artists collaborated on Suga's song "People Pt.2," which was featured on his solo debut album, "D-DAY."

Watch IU's full "Suchwita" guest appearance here:

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