Corrected entry: Milhouse actually has two 10th birthday parties, the one that Bart was not invited because Milhouse's mom said he was a bad influence, and the one where he is bragging to Bart about how his dad got Krusty the Klown (which really was Homer) to his party.
starsfan97
9th Sep 2003
Correction: Technically, Milhouse has probably had many more 10th b-day parties than that (as has the whole cast), considering no one has aged during the entire series (Bart's still in 4th grade, Lisa is still 8 years old, and Maggie's only said one word.)
starsfan97