The Simpsons (1989)

S31E21 The Hateful Eight-Year-Olds

Having cut ties with Bart, Lisa joins her new friend Addy for a sleepover, only to find herself surrounded by Addy's mean-spirited, wealthy friends who relentlessly mock her. At the same time, Homer surprises Marge with a sunset cruise, but things take a turn when he clashes with the boat's cover band.