It's Punky Brewster

Pretty Ugly (1x5)

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Punky talks Margaux into attending dweeb Avery Bigelow's dad's party so she can win a photo job for Henry. In primping Margaux up, Glomer prepares a facial that turns Margaux's face into a glomley face. Punky has to disguise herself as Margaux until the facial wears off.