Elvis Costello is the latest addition to a lineup that counts in Ramblin' Jack Elliott, Iris DeMent, Billy Bragg, Emmylou Harris, Gillian Welch, Allison Moorer, Richard Thompson, T Bone Burnett, Chip Taylor, and Avett Brothers. Golden Gate Park, Speedway Meadow, JFK near 25th Ave., SF. Free. www.strictlybluegrass.com.
Clap Your Hands Say Yeah Blogged to the ends of the earth — and to the detriment of our frayed nerves — the NYC band huddles with Architecture in Helsinki. Warfield, 982 Market, SF. (415) 775-7722.
Ladytron The beloved, wry Liverpool dance-popettes reach beyond the "Seventeen" crowd. Fillmore, 1805 Geary, SF. (415) 346-6000.
Rolling Stones They're baaack. Van Morrison makes a mono-generational affair. McAfee Coliseum, 7000 Coliseum Way, Oakl. (415) 421-TIXS. (Kimberly Chun)