The boys realize they are the only kids at school who are not hit by the new High School Musical fad, making everyone in school break out in song.
- Abusive Parents: Played for Laughs. Bridon's dad tries to force him to become a singer, when he really just wants to become a basketball player. He attacks both his son and his wife by slapping them.
- Ascended Extra: Somewhat. Scott Malkinson appeared as an Early-Bird Cameo in "The Jeffersons", but this is the first time he's given a speaking role and we get to know his character.
- Big Bad Wannabe: Bridon Gueermo's dad. He strictly forbids Bridon from playing basketball. Near the end, when Bridon tries to run away and his dad stops and threatens to slap him, he finally stands up for himself and punches him in the nose. This is enough to shock his dad and run to his wife, clutching his bleeding nose and crying about what is happening. Bridon's mom, for some reason, has never considered hitting him back an option, so she takes the opportunity to give her husband a few punches in and have him crying like a little bitch. All that revealed the fact that he's nothing more than a weak, sissy coward.
- "Billy Elliot" Plot: Inverted. Bridon's true passion is basketball, but he's forced into flashy song and dance routines by his effeminate father, who angrily insists that no son of his will become an asshole jock.
- Deconstructive Parody: This episode deconstructs the musical elements in the show, where the boys find it annoying that their classmates sing all of the sudden, and when there's a music build up for Stan to sing, he first tells the group to shut up, then sing a surprisingly different song.
- Driven to Suicide: Cartman decides he can't live in a world where High School Musical exists. The fuel exhaust from his mother's hybrid is not enough to kill him.
- Extreme Doormat: Bridon and his mom. Both never stand up to Bridon's dad, which is why he keeps abusing them. Near the end, Bridon finally gets fed up with his dad's callous regard for him and annoying theatrical mannerisms and gives the asshole the treatment he deserves by punching him in the nose. His mom, having never realized punching was an option, punches her husband afterward.
- Favoritism Flip Flop: Near the end, when the boys finally break out into song, all the other students walk away uninterested to watch Bridon play basketball, and then Scott tells them everyone only liked singing, dancing and High School Musical just because Bridon was doing it.
- Laser-Guided Karma: Bridon's dad gets a taste of his own medicine from his wife and is forced to watch Bridon play the game he's always dreamed of. He starts warming up to it when he sees the rhythmic chants done by the spectators.
- Musical Episode: Naturally, since "Musical" is in the episode's title.
- Take That!: This episode constantly takes jabs at High School Musical, in case the episode title didn't give that away. Cartman immediately heads off to commit suicide once he learns that he'd have to start liking High School Musical to fit in.