The friendly bear from "Oh, How Campy Too" makes an appearance eating sherbet in the Dreamhouse freezer.
Barbie and Skipper have this exchange after the water slide comes in the mail, calling back to "Accidentally on Porpoise":
Barbie: Finally, something to give the Dreamhouse a little flair! Skipper: You know you're the only person in the world with an indoor dolphin aquarium, right? (pan to dolphin aquarium standing in the foyer)
Raquelle proclaims that she must steal Barbie's spotlight at the pool party, because Barbie stole Raquelle's spotlight at a previous party, possibly the one from "Party Foul".
Crazy-Prepared: Ken always carries blueprints of the Dreamhouse, in case someone needs help navigating it. As well as a second Dreamhouse.
Easily Forgiven: After all the torment Closet causes in "Trapped in the Dreamhouse", Barbie still lets him stay with them. She explains that she understands that he acted that way not out of his free will, but because someone pushed his Evil button.
Fashion Show: Teresa plans one in "Trapped in the Dreamhouse".
Hoist By Her Own Petard: Raquelle's plan to steal Barbie's spotlight at Teresa's fashion show involves locking Barbie in the Dreamhouse. Unfortunately, Raquelle gets locked in as well.
Human Popsicle: Raquelle becomes one after she, Skipper, and Stacie try to escape through the freezer.
What's gotten into me? Trillions of terabytes of fashion knowledge. More than enough to become the greatest fashion designer ever. Join me and together we can rule the fashion galaxy.
Weight And Switch: Barbie tries this to remove the Dreamhouse's CPU. She grabs a Bag of Holding, pulls a guitar, an anvil, and a lamp out of it, then tries to slide the bag onto the CPU's platform. The bag proves heavier than the CPU, causing a giant Barbie styling head to pursue Barbie, Midge, and Summer.