Summer music 101: a rap/hip-hop refresher

The American rapper released his third studio album in March to widespread acclaim. Preceded by the singles "i," "The Blacker the Berry," "King Kunta" and "Alright," it topped charts in several countries. Lamar's introspective lyrics and eclectic style, bringing in elements of jazz, funk and spoken word poetry, help set apart the album as one of the year's best.