*Justin Bieber jumps on Chris Brown’s just-released “Boy in Detention” mixtape, rapping on the track “Ladies Love Me,” which samples Brown’s “Look at Me Now,” produced by David Banner. [Scroll down to listen.] Biebers lyrics include, “Baby, I’m your doctor/ I could be your rocker/ Swaggin’, I’m not braggin’ but I swear that I could [...]