The Prince Museum has opened its vault following the iconic musician’s death on April 21, releasing rare footage of Prince and Kendrick Lamar performing together.

Back in 2014, the two artists shared the stage at a private Paisley Park event celebrating the release of Prince’s albums Plectrumelectrum and Art Official Age. K Dot joined him at the Yahoo-sponsored party to perform “What’s My Name,” a deep cut from 1998’s Crystal Ball. In newly resurfaced video of the performance, Kendrick adds his own verse at the beginning of the song before handing the reigns over to The Purple One and his all-female band. It’s electrifying, to say the least.

This isn’t the first time fans have heard of Prince and Kendrick’s musical relationship -- they once booked studio time for Kendrick’s 2015 album To Pimp A Butterfly. In an interview with Grammy.com, the Compton MC explained that Prince was set to feature on the TPAB cut “Complexion,” but they never finished it due to time constraints.

“Prince heard the record, loved the record and the concept of the record got us to talking,” he said. “We got to a point where we were just talking in the studio and the more time that passed we realized we weren’t recording anything. We just ran out of time, it’s as simple as that.”

As sad as that is, at least this new video gives us an idea about just how remarkable their musical chemistry was.