Rihanna "FourFiveSeconds" (ft. Kanye West and Paul McCartney)

Rihanna 'FourFiveSeconds' (ft. Kanye West and Paul McCartney)
Kanye West recently teamed up with some dude named Paul McCartney for a track called "Only One," and now they've appeared together again on Rihanna's new single.

Called "FourFiveSecond," the song's a sweet, melodic pop song. It doesn't feature any drums, but sounds plenty full with acoustic guitars, melodic bass lines and organs. It also sees RiRi trade verses with Kanye, along with a great deal of background vocals. 

Listen to "FourFiveSeconds" at Rihanna's official site (though be patient — this thing's getting a ton of traffic right now).