YO GABBA GABBA! infuses retro-style and beat-driven music to teach simple life lessons for preschoolers. The series stars DJ Lance Rock (Lance Robertson) and a cast of colorful characters, including: Brobee, the little green one, Foofa, the pink flowerbubble, Muno, the red Cyclops, Toodee, the blue cat-dragon and Plex, the yellow robot. Today's most popular names in movies, television, music and sports flock to appear in Season Four, including Tori Spelling, Tony Hawk, Erykah Badu, Solange, The Killers, The Roots, Cut Copy and Anne Heche.