88-Keys has released the incredible "That's Life," a new collaboration with Sia and the late Mac Miller.

Mac carries the bulk of the song, sliding in and out of complementary verses with a chorus that's downright cathartic. "Fuck it, that's life," he sings at one point. As 88-Keys himself explained back in May, the track was previously leaked under the working title "Benji the Dog," with the Grammy-winning producer urging fans to wait for the official version.

In a statement Wednesday night marking the collab's release, 88-Keys revealed that the track's lyrical concept came together after a studio conversation he and Mac shared regarding relationships.

"'That's Life' is a song which sums up the sentiments of the music I've been working on over the past few years," 88-Keys said. "We all have to forge through the good, the bad, and the ugly. Mac came up with the concept for the song stemming from a conversation we had in the studio about relationships as we shared with each other what made the ones we were in at the time special. I played the song for Sia and she personally identified with the sentiments of the song and felt strongly about contributing her own thoughts on the subject matter. At the end of it all, my dear friend Mac and my new found friend Sia helped me make a song to touch the world and help many deal with adversities we're faced with, but 'That's Life.'"

Stream "That's Life" up top via Warner Records/1801 Music. RIP Mac.