At the end of the "Can't Believe It" remix, T-Pain says that Auto-Tune is almost up. What? Why would Pain, whose Thr33 Ringz debuts at #4 on next week's Billboard albums sales chart, extinguish his signature sound now?

"Not for me," Pain clarified, "for everybody else." The singer — who told DJ Skee in a separate interview that artists such as Ron Browz have used the Auto-Tune effect poorly — told MTV News that his biters need to pay up. Hey, if Diddy can collaborate with Pain and pay him for using the Auto-Tune, so can you other guys.

"I gave T-Pain one point on my [upcoming] album for using the Auto-Tune," Diddy revealed on Sunday night during "Total Finale Live."

"Sign the papers," advised Pain, who also worked on his friend Kanye West's 808's & Heartbreak. "Diddy actually gave me royalties on this album just for using Auto-Tune. He signed the contract and everything. If I can do that with Diddy, somebody else better be signing something. It's Diddy. He didn't have to involve me at all. ... I'm writing and producing on his album, and he gave me extra royalties on top of that for using something I just brought back."

Pain said that Diddy's new material is in the lane of his singing-heavy hit "Last Night."

"I gave him eight tracks," Pain said. "Eight songs. I don't how many he's gonna use, but I'll tell you how many I gave him. He's doing a little more singing. He's more like the Euro style. He's keeping it hip-hop but bringing some Euro in it. Very electronica."

Probably the biggest collabo Pain has coming up is more time with Justin Timberlake. JT surprised Pain by sending over vocals for the "Can't Believe It" remix a couple of weeks back.

"He sent it to me, I added what I did to it, and we got a remix now," Pain explained, adding with a gold-toothed grin, "I think that's what he did it for. I think he figured, 'If I do a remix, I can get him on my album.' That's how I got everybody on my album."

"Freeze," with Chris Brown, is the next single from Thr33 Ringz, and while Pain claimed to have beaten C. Breezy a couple of times during in-studio dance battles, he said Ciara — who appears on "Blowing Up" — didn't step into the ring with him.

"She don't dance too much in the studio," the Florida native said, adding that his sessions with CiCi were quick. "We did that song at the same time we did [Ciara's] 'Go Girl,' " Pain said. "She works fast. I work fast. We were working in two separate rooms and met right in the middle. I said, 'I'm done. Here you go.' She said, 'I'm done. Here you go.' "

In December, Pain kicks off the I Am Music Tour with Keyshia Cole, Gym Class Heroes and his pal Lil Wayne.

"It's weird because both of us got that [I Am Music] tattoo without knowing we was gonna get it," Pain said. "He's got it on his forehead; I just got it on my arm. I call it the T-Wayne Tour 'cause it's gonna be a highlight. People been waiting to see that."