she appeared on two songs from Charli XCX's mixtape Pop 2: as a featured artist on "Tears" and as a backing vocalist on "Delicious", the latter of which features Tommy Cash. In 2018, Polachek featured on Felicita's version of the traditional Polish song "", released on their debut studio album Hej! under the title "Marzipan". 2019–2020: Pang In June 2019, Polachek released her debut single under her full name titled "Door". In a press release for the single, Polachek announced that the single was the beginning of a new project, made mostly in collaboration with PC Music member Danny L Harle. Later in July, Polachek released two singles off of the project, titled "Ocean of Tears" and "Parachute", and began to detail her then upcoming studio album Pang which was released on October 18. The album received critical acclaim and placed on many critics' end of the year lists. A remix album titled Standing at the Gate: Remix Collection was released on vinyl on April 16, 2021. In promotion, Polachek released five of the album's remixes as singles, as well as a cover of the Corrs' "Breathless". In 2019, Polachek was a songwriter, along with Yung Jake, on the single "RIP Harambe" released by entrepreneur Elon Musk about the captive gorilla killed in 2016. In 2020, Polachek featured on "La vita nuova" by Christine and the Queens and made a guest appearance in the short film around the EP of the same name. The song was later remixed by various producers associated with PC Music, including A. G. Cook and Easyfun. 2021–present: Desire, I Want to Turn Into You In September 2021, Polachek was announced as one of the opening acts on Dua Lipa's Future Nostalgia Tour. The tour began on February 9, 2022. On November 4, 2021, Charli XCX released "New Shapes" featuring Christine and the Queens and Polachek as the second single from her studio album Crash (2022). On July 14, 2021, Polachek released the single "Bunny Is a Rider", another collaboration with Harle; she told Crack magazine that the song was part of a future project. In December, Pitchfork ranked "Bunny Is a Rider" at the top of their list of "The 100 Best Songs of 2021". On February 9, 2022, Polachek released the single "Billions". In March, she was featured on Australian electronic music producer Flume's single "Sirens", released ahead of his upcoming studio album Palaces.