Delirium is the third studio album by English singer-songwriter Ellie Goulding. It was released on 6 November 2015 by Polydor Records. The album was produced by a range of collaborators including Max Martin and Greg Kurstin. Delirium marked a shift towards a more mainstream pop sound for Goulding, incorporating elements of electropop, synth-pop, dance, house, and R&B. She described it as a turning point in her career and sought to create "bigger songs" while drawing on the more positive period of her life at the time.