Prince's two new albums ART OFFICIAL AGE and PLECTRUMELECTRUM came out yesterday, and he threw a release party at his own Minneapolis mansion Paisley Park that was livestreamed via Yahoo. Kendrick Lamar was in attendance, joining the Purple One onstage as a guest of honor for a performance of "What's My Name," a rarity from Prince's 1998 record Crystal Ball - hopefully this means a real collaboration is in store sometime soon. You can watch a short clip from that below, or wait through fifteen minutes of the recorded livestream (no fast-forwarding!) to watch the whole thing. Check it out.