Alicia Keys usually releases one or two hit singles and then drops off the face of the earth for three years before releasing another hit song. Since 'Girl On Fire' she hasn't released anything noteworthy, but that all changes today. Teaming up with rapper Kendrick Lamar, the duo have released the closing song for the new The Amazing Spider-Man 2 film due out in April.

'It's On Again' begins with a truly epic rap from Lamar, delivered with a fiery passion and anger that could easily rival Eminem. After that, Alicia takes the reigns of the Pharrell and Hans Zimmer-produced track. Over funky beats and strings meant for a cinematic paramount, Alicia's smoky vocals bounce in a fittingly lackadaisical manner interjected with quick staccatos. It all blends really well and makes for an interesting song.