Now that he’s conquered R&B, is hip-hop Chris Brown’s next frontier? The R&B singer puts his rhyme skills to the test yet again on “Real Hip-Hop #3,” his freestyle over a 9th Wonder beat. Breezy takes shots at the tabloid media (“TMZ I’m wiping my ass so stop recording”) and pats himself on the back (“Supposedly a singer can’t do hip-hop, but I just killed this shit so let the shit rock”). Are you feeling his flow?