Asked by Westwood how much he had earned from writing Rihanna's hit, he said: "That record is probably somewhere around $15 mill."
He went on to joke: "I'm just trying to pay the bills, man. I got child support bills, I got old wives' bills, I got new wives' bills. I'm working on my third wife, so I gotta pay those bills."
Speaking about the night he wrote Bieber's mega hit 'Baby', The-Dream explained: "I was in my building at Def Jam and my friend Chris Higgs who was A&R-ing the project at the time said he wanted me to write a song for Justin Bieber.
"I said, 'OK. You pay for my hotel room and I'll write you a record'. He was like, 'No, we're not paying for your hotel room'. So I was like, 'OK, I'm not going to write you a record'."
He added: "So I guess everybody thought about it for a while and then they were like, 'OK, we'll pay for your room'. My hotel room is usually $3,200 per night, but my percentage for hit-and-miss is pretty high, so I was like, 'Just pay for it'.
"I went to the studio that night and made the beat and the melodies. I let Christina Milian try the first verse melody and basically finished the track."
Asked if Milian tried to claim a credit for the song, the producer replied: "She didn't have to claim anything. I gave her a percentage of it."
Questioned on whether she got the credit because she wrote the melody, The-Dream quipped: "No, that was just because I'm generous."