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