With the caveat that humans must take Diplo's Twitter updates with a grain (several grains, probably) of salt--although his version of what happened the night of the Grammys was probably way better than anything that actually did happen--everyone else in the above Tweet is definitely on the real production team for M.I.A.'s newest. So why not Sleigh Bells? [@Diplo]

Update: The Sleigh Bells manager confirms: "Yes, Derek [Miller, who writes the music for Sleigh Bells] did production work on the album."