"Illusion" is a song by English-Albanian singer Dua Lipa. It was released through Warner Records on 11 April 2024, as the third single from her third studio album, Radical Optimism (2024). A dance song containing psychedelic and French house influences,[1][2] it was written by Lipa along with Caroline Ailin, Tobias Jesso Jr., and its producers Danny L Harle and Kevin Parker. "Illusion" topped the US Dance/Electronic Songs chart and reached the top ten in the United Kingdom, Bulgaria, Croatia, Honduras, San Marino, Flanders, Turkey, and the Commonwealth of Independent States.