Justin Bieber Raps On Chris Brown Mixtape Track

Justin Bieber issued a proud declaration from his Twitter page: "SHAWTY MANE!! I'M BACK!" Bieber, whose MC name is Shawty Mane, appears on Chris Brown's Boy in Detention mixtape rapping on the track "Ladies Love Me."

Brown dropped the mixtape just in time for the weekend on his website, and the Bieber track samples Brown's "Look at Me Now." It was produced by David Banner.

Breezy shows off his signature bad-boy swagger, rapping about all his riches. "My bad/ I'm sorry/ I'm double-parked/ Yeah, that's my Bugatti/ And that's my Ferrari/ Next to my Ducati," he raps. "Man, my house so big take the escalator to the elevator/ Take the elevator to the private and then I jet," goes another verse.

The pals swap verses with the funky beat from "Look at Me Now" behind them. Bieber shows off his own lover-boy swag with lyrics like, "Baby, I'm your doctor/ I could be your rocker/ Swaggin', I'm not braggin' but I swear that I could rock ya, baby/ I'm not crazy/ I got swag like Patrick Swayze."

Bieber and Brown were spotted in the studio last month, and many fans were wondering what they were up to. This release marks Brown's first-ever rap mixtape release. In addition to Bieber, it features appearances from Tyga, Dawn Richard, Wiz Khalifa, Swizz Beatz and Kevin McCall, to name a few. 9th Wonder, DJ Chuckie and No I.D. are a few of the producers who get credits on the mixtape.

This isn't Bieber's first foray into the world of rapping. He rapped on the Sean Kingston track "Won't Stop" and spit some rhymes as Shawty Mane in a Twitter video he posted last year.

It's also a big month for Brown, who's up for several Moonmen at the MTV Video Music Awards later this month. He's nominated for his frantic Chris Tilley-directed video for "Look at Me Now." Brown is also slated to perform at the show.