Alicia Keys, Kendrick Lamar, Pharrell Team Up On 'It's On Again,' From 'The Amazing Spider-Man 2' | HuffPost Entertainment
Kendrick Lamar, Alicia Keys release 'Spider-Man 2' song - UPI.com
Alicia Keys, Kendrick Lamar Team for 'It's On Again' on 'Spider-Man 2' Soundtrack – Billboard
Alicia Keys, Kendrick Lamar, Hans Zimmer & Pharrell Williams Shot Video For 'It's On Again' - The Neptunes #1 fan site, all about Pharrell Williams and Chad Hugo