Organizers of the Girls Got Rhythm Fest, slated May 11-12 at the Amsterdam Bar & Hall, have a special treat lined up for Mother's Day. They've added a May 13 all-ages show to their inaugural festival, turning it into a three-day lineup. Japanese trio the 5.6.7.8.'s -- already slated to perform on the May 12 show opening for Ronnie Spector -- will hang around an extra day to headline the 5 p.m. Sunday gig, also at the Amsterdam Bar and featuring three other acts from the previous nights: Caroline & the Treats, Midnite Snaxxx and the Pinsch. Tickets for Sunday will only be $10 advance. The Sunday show will NOT be included in the price of the two-day festival pass ($65). Click here for details.

Kudos to the GGR Fest crew and their pals at Radio K for cutting in under-age fans on what's already shaping up to be quite a positive and meaningful event.