Hip-hop rules at Grammys show, Adele falls flat

Hip-hop ruled the Grammys stage on Monday in performances that put racial tension back in the national spotlight and where some of music's biggest stars failed to deliver, or in the case of Rihanna, failed to show up at all. Kendrick Lamar's "To Pimp a Butterfly" lost out on the coveted album of the year. "I'm African-American, I'm African, I'm black as the moon, heritage of a small village, pardon my residence, came from the bottom of mankind," rapped Lamar, 28, who hails from Compton, Californ