Masked Girls Everywhere!

 is the tenth episode of the fourth season of Star Teens Unite!.

Summary
At home, Ella, her mother Trixie, her young sister Julie, and her friends, wearing their masks, wonder if every world would look like when their faces are covered with Star Teen masks when every particle is spread every city around the world including schools, even in Arco Iris.

Characters

 * Ella
 * Inidra
 * Sandra
 * Felicia
 * Lisa
 * Tanya
 * Sheila
 * Julie (Ella's younger sister)
 * Trixie (Ella's mother)
 * Debbie (Inidra's mother)
 * Samantha (Sandra's mother)
 * Paul (Sandra's younger brother)
 * Judith (Felicia's mother)
 * Daphne (Lisa's mother)
 * Elena (Tanya's mother)
 * Antonio (Tanya's younger brother)
 * Maya (Tanya's younger sister)
 * Heather (Sheila's mother)
 * Ms. Diana Apple
 * Nurse Penny Harrison
 * Miss Addison
 * Veronica
 * Stinky
 * Eileen Kimball
 * Daisybelle and the fairies
 * Nemo
 * Queen Coral
 * Maris
 * Killer particles

Voice Cast

 * Aimee Carrero - Tanya
 * Alana Ubach - Antonio
 * Ariel Winter - Julie, Nemo, Fairy
 * Ava Acres - Fairy
 * Colleen O'Shaughnessey - Trixie
 * Cree Summer - Heather
 * Grey Griffin - Sandra, Samantha
 * Isabella Acres - Fairy
 * Jennifer Hale - Veronica
 * Jessie Flower - Maris
 * Jodi Benson - Queen Coral
 * Julie Nathanson - Miss Addison
 * June Angela - Daphne
 * Kari Wahlgren - Ella
 * Kate Micucci - Inidra
 * Kath Soucie - Debbie, Paul, Nurse Penny Harrison
 * Kimberly Brooks - Sheila
 * Madison Pettis - Daisybelle
 * Mae Whitman - Stinky
 * Maria Canals Barrera - Elena
 * Michaela Zee - Fairy
 * Nika Futterman - Maya
 * Tara Strong - Felicia, Judith
 * Veronica Taylor - Eileen Kimball
 * Vyvan Pham - Lisa

Trivia

 * Everyone in this episode, even in Arco Iris, are wearing face masks throughout---basically due to killer particles spreading!