Rihanna, Paul McCartney and Kanye West Perform 'FourFiveSeconds' at the GRAMMYs

By Brian Ives

The song was only released days ago, but Rihanna's collaboration with Kanye West and Paul McCartney got its first public performance on the 57th Annual GRAMMYs.

On a pretty spare stage, the somewhat unlikely trio performed the song with a bit more instruments than the studio version, which only features Sir Paul's acoustic guitar and keyboards. This time they added a bass player and guitarist.

Will they ever hit the stage together again? Or will Paul move on to work with other younger artists (recall that last year he won a GRAMMY for "Cut Me Some Slack," his collaboration with Nirvana alum Dave Grohl, Krist Novoselic and Pat Smear).

Although Paul's clearly been in the lab with Kanye, he also worked with 'Ye on "Only One," another recent release, which Yeezus also performed (sans Paul) earlier tonight.

Read more about the 57th GRAMMY Awards on Radio.com's GRAMMYs live blog.