Update: Björk posted a note on Facebook confirming her involvement. It reads:

i am proud to announce my vocals landed on the new death grips album ! i adore death grips and i am thrilled to be their "found object" ! i have been lucky enough to hang and exchange music loves w/ them and witness them grow !! epic : onwards !!

Death Grips have just released the first installment of a surprise double LP available for free download and stream via the band's Facebook. It's called niggas on the moon, and according to the band Björk is featured on all eight tracks. Listen to it above.

Disk 2 of the release will be called jenny death. The full release is called the powers that b, and it's due out later this year on Harvest/Third Worlds Records.

You can stream the entire release via Youtube or you can download it here.

By the way, one of the songs is called "Have a Sad Cum". Check out the track list (via Youtube) below.

niggas on the moon

01 Up My Sleeves

02 Billy Not Really

03 Black Quarterback

04 Say Hey Kid

05 Have a Sad Cum

06 Fuck Me Out

07 Viola

08 Big Dipper

Listen to the first song on the record, "Up My Sleeves":