(HIPHOP FESTIVAL) Opening tonight, the third annual Back to Its Roots festival runs the entire weekend, offering three days of hiphop performances and workshops by local masters like Massive Monkees and Vitamin D. The festival is important because it attempts to return real hiphop—the hiphop that came out of the Bronx and was a response to, and shaped by, postindustrial urban condition—back to the streets, the people, and the youth. There will be breakdancing, scratching, rapping, and graffiti—in short, all the elements that constitute the last major art movement of the 20th century. (Langston Hughes Performing Arts Center, 104 17th Ave S, 684-4757. 8 pm, $12/$7 youth, all ages.) CHARLES MUDEDE