Rihanna has called on Justin Timberlake, Jay-Z and Kanye West to work on her upcoming album.

The Umbrella star wants to achieve a "more mature" sound on her fourth LP and wanted "more rock and pop notes" than the last one, Good Girl Gone Bad.

According to Perez Hilton, Pharrell Williams has also been approached about a possible collaboration and a planned duet with ex-boyfriend Chris Brown was been scrapped.