Big Sean Readies 'Detroit' Mixtape; Recruits Chris Brown, Wiz Khalifa & More

Big Sean poses backstage at the KMEL Summer Jam concert on June 10th in Oakland.

When not working on the Good Music compilation album, "Cruel Summer," alongside Kanye West, Big Sean has been prepping his upcoming mixtape, "Detroit."

The rapper recently told Hip-Hop Wired that his fourth mixtape, slated for a Sept. 5 release, will feature appearances by his VIP friends such as Chris Brown, J. Cole, Wiz Khalifa and Juicy J.

"The only reason why I haven't put it ['Detroit'] out yet is because I just didn't want to put anything on there that we really could have used on the album. I wanted to be comfortable with every single thing," Big Sean said. "That was the only hold up. We've been rocking to it and listening to it and we've got a lot of good people on there. The mixtape has J.Cole, Chris Brown, Juicy J, Wiz Khalifa, you know, good ass features."

Wiz, Breezy and Sean have teamed up before, most recently on Chris Brown's "Till I Die. The "Fortune" single peaked at No. 12 on the R&B/Hip-Hop Songs chart and is currently at No. 19.

Sean is also setting aside a few tracks for his sophomore studio album. "A lot of people don't want me to do it because they are saying 'man, the album is what it is and I don't know why you want to drop a mixtape," Big Sean told HHW. "But I ain't doing it [mixtape] to let people know where I'm artistically at, I'm doing an album to let people know where I'm artistically at. I'm doing an album to change the world. I'm doing a mixtape because that's how I came up. That's where a lot of my core fan base is, my core believers, and people who believe in me."