IU says she and Oh Hyuk had their share of arguments during their collaboration for her latest album 'Palette'.

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The two artists collaborated on the song "Can't Love You Anymore", which ended up getting a perfect all-kill on music charts. In an interview on April 21, IU revealed, "After making the track's lyrical items and melody for the chorus, I thought of Oh Hyuk. I thought his warm yet wild vocal tone would be go with the song well. That's why I asked him to feature on it first."

She added, "We're the same age, so we worked on the song together like comfortable friends. We had times where our opinions clashed, but I think there was a good product through compromise. It's hard to say who's more stubborn because we're neck and neck, but we completed everything well by being stubborn sometimes and giving in sometimes."