S7E25: Summer of 4 Ft. 2

In "The Simpsons" Season 7, Episode 25, titled "Summer of 4 Ft. 2," Lisa tries to reinvent herself while on a family vacation to a beach house. By the episode's end, Lisa has managed to fit in with a group of local kids by ditching her usual nerdy persona. However, Bart, feeling left out and jealous of Lisa's newfound popularity, exposes her true identity by showing the kids her yearbook filled with academic achievements and nerdy accolades. Lisa is initially crushed when the kids see her yearbook and her cover is blown. But instead of mocking her, the kids accept Lisa for who she is, appreciating her for more than just her attempts to fit in. Meanwhile, Homer spends the vacation trying to score free stuff by posing as a beach bum, only to be outsmarted by a local store owner who gives him junk instead. In the end, Lisa learns a valuable lesson about being herself, and the family returns home. The episode wraps up with a typical Simpson family scene as they drive back to Springfield, having survived yet another chaotic family outing but with Lisa feeling a bit more secure in her own skin.