 "Penguin" itself was heavily sampled in 2011 by British singer Leona Lewis for her song "Collide", allegedly without Avicii's authorisation, resulting in a legal controversy over the sampling rights until the song was made a joint release between Lewis and Avicii.When "Fade into Darkness" was referred to as "Penguin", the song received comparisons to Leona Lewis' 2011 song "Collide".The song ("Collide") originally credited Lewis as the only artist on the track, which prompted a lawsuit against Lewis, and her record label Syco, as Avicii claimed that they had sampled "Penguin" without his permission.