Rihanna recorded a duet with Chris Brown for her new album.
The 24-year-old singer will release her seventh studio album, Unaplogetic, later this month.
Rihanna posted the 15-song tracklist on her Twitter account late last night.
Scrawled on a napkin at number ten is a song called Nobodies Business (sic), featuring Chris.
Rihanna and Chris split in 2009 after he was convicted of assaulting her.
The pair fuelled rumours of reconciliation after he split from girlfriend Karrueche Tran last month.
Appearing to hint at the musical collaboration in a thinly veiled reference to their relationship, Rihanna took to Twitter.
"Aint nobody bidness..... But mine and my baby!" she wrote.
Rihanna has previously worked with Chris on tracks including Birthday Cake and Turn Up The Music.
The new album also features collaborations with rapper Future on a track called Loveeeeeee Song and with Eminem on Numb.
Rihanna will embark on a Diamonds World Tour in March 2013 to support the release of the new album.
