Rihanna unveils her new song, featuring Kanye West and Paul McCartney

Singer Rihanna gave a pleasant surprise to her fans by releasing a new song featuring rapper Kanye West and singing legend Paul McCartney.

The “We found love” hitmaker took to micro-blogging site Twitter Saturday to announce her new track in collaboration with McCartney and West.

The 26-year-old shared the song titled “Four five seconds” with a tweet that read-- “FIRST GLIMPSE AT MY NEW MUSIC!!!”

The track features 72-year-old former Beatle McCartney on guitar and 37-year-old Kanye rapping.

Rihanna's previous album “Unapologetic” released in November 2012.