The Buckinghams in Concert

01:02 PM PST on Thursday, February 17, 2011 By LYNN LIEU Special to The Press-Enterprise The Turtles, The Grass Roots and The Buckinghams are bringing back the '60s and '70s on Saturday in a greatest hits concert at the California Theatre of the Performing Arts. "We've all been friends for many years, there's no doubt about it," said Mark Volman of The Turtles. "This is going to be a show that centers itself around the greatest hits of each group. I think audiences like that because there won't be a lot of filler music. When you narrow it down and each group gets to play their best songs, people really enjoy that." Rodrigo Pena / Special to The Press-Enterprise Mark Volman, left, a.k.a. "Flo" and Howard Kaylan, right, a.k.a. "Eddie" from The Turtles, perform during the Happy Together Tour at the Soboba Casino in San Jacinto on Sunday. Carl Giammarese, of The Buckinghams, agreed. "It's always great to do a show with ...