Sue and Lexie sublet their apartment to Derek and Andy, who Airbnb it to the professor. In season 7, Axl and Hutch rent their house from Derek and Andy, who illegally sublet it then too.
Lexie mentions that her father bought them "that thing that makes frozen yogurt from bananas". The eleventh episode (Mewnipendence Day/The Banagic Incident (2015)) of the first season of Star vs. the Forces of Evil (2012), dealt with the title character's quest for a product called the "Banagic", which turns bananas into frozen yogurt. Eden Sher also voices Star Butterfly.