Rock the Bells 2012

The crowd cheers on Common as he performs during the first day of Rock the Bells at the San Bernardino Nos Events Center.

The crowd cheers on Common as he performs during the first day of Rock the Bells at the San Bernardino Nos Events Center. (Allen J. Schaben / Los Angeles Times)

Aug. 19, 2012 11:42 AM PT

Scenes from the 2012 Rock the Bells hip-hop festival at the San Bernardino Nos Events Center.

Cooling off at Rock the Bells

Tony Williams, left, and Brianna Marlisa, both of Reno, cool off with misting fans amid high temperatures at the two-day music festival. (Allen J. Schaben / Los Angeles Times)

Kid Cudi at Rock the Bells

Kid Cudi performs during the first day of Rock the Bells. (Allen J. Schaben / Los Angeles Times)

MC Treach at Rock the Bells

Naughty by Nature’s MC Treach performs. (Allen J. Schaben / Los Angeles Times)

Black Hippy at Rock the Bells

L.A.-based hip-hop supergroup Black Hippy, which features Top Dawg Entertainment rappers, from left, Ab-Soul, ScHoolboy Q, Jay Rock and Kendrick Lamar, takes the stage at last year’s Rock the Bells. (Allen J. Schaben / Los Angeles Times)

Kid Cudi at Rock the Bells

Kid Cudi rocks some shades on stage. (Allen J. Schaben / Los Angeles Times)

J Cole at Rock the Bells

J Cole performs. (Allen J. Schaben / Los Angeles Times)

KRS-One at Rock the Bells

A DJ gets the crowd warmed up before KRS-One performs. (Allen J. Schaben / Los Angeles Times)

DMX and Eve at Rock the Bells

DMX + Eve perform. (Allen J. Schaben / Los Angeles Times)

KRS-One at Rock the Bells

KRS-One does some freestyling. (Allen J. Schaben / Los Angeles Times)

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