Diamonds singer Rihanna - who has raised eyebrows over her decision to rekindle her friendship with Chris after he assaulted her in 2009 - was spotted leaving the same recording studio in West Hollywood that the RnB star was seen at, sparking rumours they were teaming up for some new music.
A rep for Chris has now told E! News that the pair are working on another single.
The pair recently collaborated on the song Nobodies Business, which is on Rihanna's latest album, Unapologetic.
Rihanna and Chris have kept fans guessing about their relationship status in recent months. Although they have not directly said they are dating again, the pair have been tweeting pictures of themselves and apparently saw in the New Year together.