Ludacris, Kanye West and Chris Brown have joined the roster of guest artists on T-Pain's third album, "Thr33 Ringz," due in the fall via Jive. Official first single "Can't Believe It" featuring Lil Wa

Ludacris, Kanye West and Chris Brown have joined the roster of guest artists on T-Pain's third album, "Thr33 Ringz," due in the fall via Jive. Official first single "Can't Believe It" featuring Lil Wayne is No. 50 in its third week on Billboard's Hot R&B/Hip-Hop Songs chart.

Elsewhere, Chris Brown appears on the dance track "Freeze," while Ludacris guests on "Chopped & Screwed," DJ Khaled lends a hand on "Karaoke" and West joins the fun on "Therapy."

"Thr33 Ringz" follows 2007's "Epiphany," which has sold 830,000 copies in the United States, according to Nielsen SoundScan.

T-Pain remains a fixture on the charts with guest appearances. He can currently be heard guesting on Lil Wayne's "Got Money," DJ Khaled's "Out Here Grindin,'" Rick Ross' "The Boss," Mike Jones' "Cuddy Buddy" and Tay Dizm's "Beam Me Up."

As previously reported, the latter is the first signee to T-Pain's digital-only Nappy Boy label.