Vintage Steve Miller Youngbloods 1968 Carousel CONCERT POSTER original Kelley. This is an original 1968 Carousel Ballroom concert poster, designed by prominent psychedelic artist Alton Kelley, for a three-night engagement held on May 10-12, 1968, featuring the Steve Miller Band, Kaleidoscope, and The Youngbloods. Size: 22″ x 28″.