"It's On Again" is a song by American singer Alicia Keys featuring American rapper Kendrick Lamar. The song was written for the 2014 superhero film The Amazing Spider-Man 2 by Keys and Lamar in collaboration with Hans Zimmer, who scored the film, and producer Pharrell Williams, "It's On Again" was released on March 31, 2014 as the lead single from the film's soundtrack.