Chris Brown "switched the envelope" when it came to working with Kendrick Lamar.

The R&B superstar collaborated with Lamar on 'Autumn Leaves' and says the pair "made magic" with the track.

Speaking to MTV News, Brown explained: "I think people automatically assumed [that] with me and Kendrick Lamar, if we actually collaborated, it's gonna be a club joint, but for me, I always like to change and switch the envelope. Even when I did Juelz Santana on 'Run It,' at that time, real hard-core [rap music] wasn't really fusing with R&B like that. I try to change it up as much as possible. It's what I love to do."

He added: "Me and Kendrick on 'Autumn Leaves,' it's more of a sit in your car and ride-to record. It's a real laid-back record, but it's also a substance record."

Brown also explained the meaning of the song's title.

He revealed: "It's basically saying [that] you put in so much to get so little. Whether it be in relationships or just in life, you work hard for something all the time and get so little, but you still hold on, like the last leaf in autumn."