Kendrick Lamar

The Icelandic-Chinese singer-songwriter Laufey performs in Seattle on Oct. 4. She's captivated young fans with her blend of jazz and pop, but she's not the only modern pop artist who nods to jazz.

The fluid and sprawling untitled unmastered. was released unexpectedly. It feels like a peek behind the curtain of the rapper's creative process — using some material that fans already know.