The collaboration is particularly shady given Harris' Twitter rant against his ex-girlfriend, Taylor Swift, last year, where he namechecked Perry, and the years-long media sparring that has gone on between the two pop powerhouses.
Harris' post also includes a teaser of the new music, as well as a slew of featured artists in addition to Perry, including Frank Ocean (who has his own "bad blood" with Swift), Ariana Grande, Snoop Dogg, Future, Pharrell, Big Sean, John Legend, Migos and Nicki Minaj. Just to name a few! Watch the teaser video below to see all of the seriously stacked lineup.
Whether the pair's history with Swift makes it into the album remains to be seen, but you HAVE to imagine it came up once or twice during recording!