Rihanna, Beyonce, Miley Cyrus and Mariah Carey are to team up for a new charity single to benefit cancer funding.

The quartet will be among the 12 stars who will be heard on new track Just Stand Up, which will debut during a September 5th cancer awareness telethon in America.

Joining the girls will be Mary J. Blige, Ciara, LeAnn Rimes and Fergie.

Music moguls Kenneth 'Babyface' Williams and L.A. Reid will produce the track, which will be available as an iTunes download to coincide with the telethon.