Rihanna's first glimpse of new music has arrived in the form of "FourFiveSeconds," featuring Kanye West and Paul McCartney.

It's possible this is the much-rumored collaboration Ty Dolla $ign first discussed several weeks ago, although it's worth noting he said he recorded about six other tracks with West during the same session.

"FourFiveSeconds," which is certainly unlike Rihanna's previous material, can be heard below via the singer's website. It is also available on iTunes.

According West associate Ibn Jasper, McCartney co-produced West's entire upcoming album. But a rep for West tells us that claim is not true.

UPDATE (Jan. 26): A rep for Rihanna has confirmed the track will appear on both her and West's respective albums, neither of which have a release date.