Both Beyoncé and SZA had unreleased songs leaked on Spotify and Apple Music over the past few days:

Under the name Queen Carter, the albums “Have Your Way” and “Back Up, Rewind” appeared on Spotify and Apple Music, featuring demos, previously released songs and unreleased tracks by Beyonce. Hours later, they were removed.

And:

Nine unreleased SZA tracks were leaked on Spotify today. The songs, two of which feature Kendrick Lamar, were listed as an album called Comethru under the moniker Sister Solana. SZA has since responded to the leak on Instagram: “These are random scratches from 2015. Def not new new! But… creative? And scary?” Comethru was later removed from Spotify, but the Sister Solana artist page remains on the platform.