Sky Ferreira has seemingly suggested that some of her old songs were used on Charli XCX's Wuthering Heights album.

The 33-year-old pop star released the soundtrack album for Emerald Fennell's drama film earlier this year, but Sky has now suggested that elements of the Wuthering Heights album were based on some of her old work.

Sky made the comments on Instagram after a fan reposted a clip of the singer's 2012 music video Everything Is Embarrassing on X. The post featured the comment: "i wonder what’s her form of income (sic)"

Sky then turned to the fan's Instagram and wrote: "Someone sent me your X account. I toured for years. I work. I hate to break it to you, but your favorite artist records my old songs.I hope that answers your question. Xoxoxo (sic)"

Sky - who is credited as a featured artist, co-writer and vocal producer on Wuthering Heights track Eyes of the World - later added: "I wasn’t going to say anything…It brought back a lot of things I have worked really hard to move past."

Meanwhile, Charli's management team has issued a statement in response to Sky's comments.

The team told Billboard: "Charli has made seven albums, four mixtapes and one EP, and has written countless songs for other artists throughout her career. She began as a songwriter with I Love It, and her work has been recorded by and pitched to multiple artists. She has her own personal history with publishing and production negotiations and because of this, she always shares credits fairly and appropriately, and values her collaborators tremendously.

"Ahead of the Wuthering Heights album release, a standard review process was conducted on a small number of tracks from the album, including fragments of material originating from earlier sessions. This process involved managers, legal representatives, artists and producers, and included a thorough review of archival materials and demo recordings.

"All relevant parties were consulted throughout, and the album was played in full in advance of release to everyone. Songwriting credits and splits were determined and agreed collectively in writing, with reference to documented timelines and contributions.

"All credits were finalized and formally approved by the appropriate parties prior to the album’s release."

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