Justin Bieber has been working on new music with Chris Brown.
The pair - who previously worked together in 2011 - have been in the recording studio with Breezy and Akon.
Justin posted a picture online of him and Chris and wrote: "Studio, me and CB did 1 for the fans."
Brown tweeted: "Humbled and Blessed...Back to the Music and the Fans...Thank you GOD."
The pair previously recorded a duet for Breezy's 2011 album, F.A.M.E., called Next To You.
Justin, 20, is currently awaiting trial for DUI following his arrest in Miami in January. Chris was recently sentenced to serve time in jail for violating the terms of his probation following his domestic violence attack on then girlfriend Rihanna in 2009.
And Breezy recently got out of jail where he was serving time for drugs charges.