Pop sensation Rihanna shocked the world on Saturday afternoon when she released a brand new single 'FourFiveSeconds.'

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The new single, featuring legendary musical icon Paul McCartney and Kanye West, features a Caribbean rhythm with an acoustic tone.

The singer sings she's "Four, five, seconds from wildin'" while McCartney plays the acoustic guitar and West raps.

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Before Rihanna released the new song, she took to Twitter to share a photo of the trio posing along side each other.

When the singer announced that she had partnered with West and McCartney for the new song, her fans on Twitter went crazy.

RiRi's new single is already a hit and fans can visit the iTunes website to purchase the song.

Rihanna tweeted a special message to her fans thanking them for supporting her new music and it's clear that she loves her supporters.

Just last year the singer announced that she was working on her eighth studio album and her fans are beyond excited to hear more music.

In December, RiRi posted a snippet of one of the singles on her album R8 and people can't wait until they can get their hands on a copy.

A relsease date for Rihanna's new album has yet to be announced so be sure to check in for more details.

Tags: Rihanna Paul McCartney Kanye West