Guest Stars Winston James Francis as Nightmare Betsy Sodaro as Donna Jessica Kozak as Stella Peyton List as Sierra Helen Sadler voices BBZ Reporter V.O. James Corden as Himself Mary Holland as Alexa / Suzanne Pia Mia Perez as Rylie Darrin Rose as Promoter Dave Theune as Nerdy Guy Michael Yo as TV Host Angela Whittaker voices Election V.O.