It was a classic Hip-Hop moment, as Just Blaze and Swizz Beatz got together for a friendly beat battle on Friday night (Feb. 25). After making the announcement earlier this week, the two GRAMMY Award-winning producers live streamed the event on Instagram Live. Alicia Keys, Busta Rhymes and Cassidy were in attendance, seen watching the legendary beatmakers go back and forth for nearly 3 hours, playing hits songs and deep cuts by Beyoncé, JAY Z, Usher, T.I., The LOX, Kanye West, Fat Joe, Drake, Jay Electronica, Rick Ross and more from their illustrious catalogues.

The stars even tuned-in, as Diddy, Kelly Rowland, DJ Khaled, Q-Tip, Meek Mill, T.I., Snoop Dogg, Timbaland, The Alchemist and Clark Kent were spotted throughout the live stream commenting and taking in the big event. The much talked about moment of the night came during the finale (2:27:00 mark), where for his last play, Swizz Beatz pulled out a major unreleased song by DMX featuring Nas, JAY Z and Jadakiss.

Produced by Swizzy, the song presumably will appear on Dark Man X’s forthcoming new album executive produced by the Ruff Ryders producer himself. Watch the full battle below.

Continue after the jump….