Kendrick Lamar, who opened atop the R&B/Hip-Hop Albums chart this week with "good kid, m.A.A.d. city," strides onto Billboard's Social 50 chart at No. 47. The debut comes after a busy week of social activity for the rapper, who also entered at No. 2 on the Billboard 200. Other noteworthy moves on the Social 50 come from Jesse and Joy, the xx and Bruno Mars.
