The music industry publication reported Friday the two performers join an expanding list of guest artists who have agreed to take part in the rapper's third album, which is due out this fall.
Rapper Lil Wayne is featured on the album's first single, "Can't Believe It," which has reached No. 50 on Billboard's Hot R&B/Hip-Hop Songs chart.
In addition to West and Brown, rappers Ludacris and DJ Khaled have been announced as guest artists on the upcoming album.
"Ringz" marks the follow-up to T-Pain's second album, "Epiphany," which Nielsen SoundScan said sold 830,000 copies nationwide.