It shakes me to my core, semi-honestly, but in support of the recent DVD release of Alvin and the Chipmunks, there will be at least a half dozen free, live, stage show concerts performed in San Diego and San Francisco. The event in the latter city is tomorrow afternoon and evening, April 11, at Newpark Mall, at 3 p.m., 4:30 p.m. and 6 p.m.; the former is Sunday night, at the Chula Vista Center, at noon, 1:30 p.m. and 3 p.m. Bring your own helium balloons, I guess…