Charlotte singing "Concrete Shoes" in the web series.
- Please note that the songs do not have official titles; the titles listed below are what seem most logical.
Almost every episode contains a musical number, mainly sung by Charlotte. Episodes that lack songs include "Shrinking Slug", "Rainy Day Schedule", "Rubella", "Super Evil" and "Parentnapped". Some episodes have two or more songs. Around 40 songs have been performed. The song "Monkeys" have been sung in three episodes, but with different lyrics. The theme song appears in every episode.
Web series
Season 1
| Episode | Song | Performer(s) |
| New Student | Kitty | Charlotte |
| Show and Tell | Monkeys | Charlotte |
| Vegetables | Eat Vegetables with Every Meal | Vegetable fiends |
| Scissor Fiend | Vendetta's My Friend | Charlotte |
| Halloween | Today is Halloween | Charlotte |
| Kitty Kitty Kitty | Kitty Kitty Kitty | Charlotte |
| Birthday | Happy Birthday | Vendetta |
| Mrs. Minty | No. 2 Pencil | Charlotte |
| Feeding Pets | Feeding Vendetta's Pets | Charlotte |
| Fancy Hat |
Season 2
| Episode | Song | Performer(s) |
| No More Charlotte | Vendetta | Charlotte |
| Election | Vote, Vote, Vote | Charlotte |
| President Vendetta | ||
| Invisible | Invisible | Charlotte |
| Wonderful Wintry Day | Wonderful Wintry Day | Mr. Milk, Marvin, Marion, Maggie, Charlotte, Malachi and flowers |
| Valentine's Day | Chocolate Lake | Charlotte and Vendetta |
| April Fool's | Shiny Shiny Puny Star | Charlotte |
| Concrete Shoes | Concrete Shoes | Charlotte |
| The End of All Things | With You | Charlotte |
| Web episode 21 | Clams | Charlotte |
Specials
| Episode | Song | Performer(s) |
| Christmas Bonus | Christmas Bonus | Charlotte and Vendetta |
| Making Friends | A Fiend to Destroy You | Charlotte |
TV series
| Episode | Song | Performer(s) |
| Charlotte's First Day | Swing Set | Charlotte |
| Monkeys | ||
| A Fiendish Friend | Why Don't We Pretend to Be... | Charlotte |
| Vegetables | Eat Vegetables with Every Meal | Vegetable fiends |
| Toupee | Could I Be a Swiss Banker? | Mr. Milk, Ms. Minty and Toupee fiend |
| Mama Vendetta | Pretty Pink | Charlotte |
| We're Happy Family | ||
| Shrinking Charlotte | Now That We're Small | Charlotte |
| Parents | Now You're Here | Charlotte |
| No Singing | Lungs | Charlotte |
| Monkeys | ||
| Puppies! Puppies! Puppies! | A Surprise for Vendetta | Charlotte clones |
| Shorts: Set 1 | Onions | Onion chanteuse |
| What a Pretty Town | Charlotte | |
| Marvin the Middle Manager | My School | Charlotte |
| Middle Managing | ||
| Butterfly | Charlotte and Marvin | |
| Smash | Pancakes | Charlotte |
| New Best Friend | Me and My Best Friend Marion | Vendetta |
| Tornado | Neighbors | Charlotte and Vendetta |
| Shorts: Set 2 | Cheese, | Charlotte and Vendetta |
| If I Lived Upon the Moon | Charlotte | |
| If You Lived Upon the Moon | Vendetta | |
| Pony | Pony for Me | Charlotte |
| I've Got a Pony |
