Isabella Roarson is a monster pop star who comes to Roarsville looking for talent to join her in her show. Summer Hugglemonster is among her greatest fans. Isabella first appeared in the episode "Number One Fan". She is voiced by Geri Halliwell of the Spice Girls.
Have a Henry Hugglemonster Day | I've Got Pizzazz | To Monsterschool | The Hugglemonster Way | Roar it Up! | Number One Fan | Welcome to Our Home | Hugglemonster Manners | Wanna Touch the Sky | Being Big's Roarsome and How | Monster Heart | Grrrrls Just Wanna Roar | The Roaring Lion | Who Needs a Fang | Heromonsters Woohoo! | You Go Well Together | Everybody's Good at Something | Knit it Up | Play By the Rules | Make Your Own Fun! | So, So Roarsome