Keys is also joined onstage by Araab Muzik, Johnny Marr and Hans Zimmer to deliver the first TV performance of the track that appears in the soundtrack of 'The Amazing Spider-Man 2'.
Alicia Keys joined forces with Kendrick Lamar to perform their collaboration, "It's on Again", when they recently hit the stage of "The Tonight Show Starring Jimmy Fallon". The performance opened with the Compton MC sitting on the stage while spitting his bars.
After Lamar finished his part, Keys who played the piano sang her lines as she was joined by several backing vocalists. During the performance, the two stars were also joined onstage by AraabMuzik, Johnny Marr and Grammy-winning composer Hans Zimmer.
"It's on Again" was produced by hitmaker Pharrell Williams. That night marked Keys and Lamar's first time to perform the song on television. Zimmer recently talked about working on the track with the stars in an interview with Rolling Stone.
"We were this pressure cooker," he said. "Having all this talent in the room, there were ideas flying around all the time. They weren't just about music. They were about story, they were about all sorts of things."
"It's on Again" serves as the soundtrack to upcoming movie "The Amazing Spider-Man 2" which will open in U.S. theater on May 2.