Justin Bieber stopped by “The Cipha Sounds & Rosenberg Show with K. Foxx” to drop another freestyle. This time, the 17-year-old pop sensation, who goes by the rap name Shawty Mane, rhymed over Gang Starr’s “DWYCK,” earning respect from the show’s hosts. He also covered Frank Ocean’s “Thinking About You” with his famous pal Jaden Smith. How did he do?