Watch out, Xena. There's a new warrior princess in town and her name is Murna.Super Fun Night (9:30/8:30c, ABC), Brooke Shields guest-stars as Alison, an actress who plays Murna Princess Warrior, aka Marika (Lauren Ash) and Helen-Alice's (Liza Lapira) childhood hero. But the actress doesn't turn out to be all they had hoped for when they meet her at the Murna Princess Warrior Convention. Then again, Marika doesn't make the best first impression.Check out the sneak peek below. Super Fun Night airs Wednesdays,9:30/8:30c on ABC.