Traveling hip-hop festival Rock the Bells is taking a page out of the genre's history books by focusing on a set of game-changing albums for this year's showcase. Though still relatively downsized from lineups of the past, a who's who of rap royalty, including Lauryn Hill, Nas, Cypress Hill, Mos Def and Talib Kweli, Mobb Deep, Raekwon and Ghostface, and the GZA, headline the bill for the eighth year of the multi-city festival. San Manuel Amphitheater, 2575 Glen Helen Parkway, San Bernardino. Noon Sat. $50-$100. rockthebells.net.