Dirty Heads, 311, Atmosphere, and Rome headline a multi-act outdoor concert at the Long Beach Amphitheater, showcasing a blend of alternative rock, reggae-tinged rock, and hip-hop on a coastal Southern California stage. The bill pairs legacy rock/reggae outfit 311 and reggae-rock group Dirty Heads with indie hip-hop veterans Atmosphere and the artist Rome, offering a genre-spanning evening typical of summer amphitheater lineups in Long Beach.