Madeline

When Madeline and the girls go to New York to meet their culturally diverse penpals and celebrate Halloween, Madeline finds some mysterious spider earrings in her trick or treat bag which she traces to Miss Clavel's missing cousin Fifi, a famous radio star.

Madeline and girls visit Miss Clavel’s cousin Fifi at the radio station for the Halloween broadcast and accidentally leave the microphone on as they tell a scary story about ants invading New York, which is broadcast "War of the Worlds" style all over the city, sending all of the metropolitan area into a panic.

The girls enter a cancan competition, but the intense practice schedule and concerns about costumes creates a problem: cliques. The girls break into groups and exclude and taunt each other until Madeline, with the help of two legendary cancan stars, has the job of helping the girls make amends in time for their final competition.

When Madeline’s sinuses act up, Dr. Cohn suggests she go someplace warm, so Lord Cucuface sends the girls to Cannes. Not heeding Miss Clavel's warning, Madeline stays on the beach all day, and gets sunburned, so she's forced to stay inside. She is so lonely and bored, Lord Cucuface asks his director friends to bring their latest movies - and, on Madeline's suggestion, a contest - The Cannes Film Festival is born.

When Yvette is asked to pose for a famous contemporary artist, she brags to the other girls and acts superior because this obviously means she is beautiful. She gets her comeuppance when the painting is finished; it has an eye in a corner, a green face and no chin - a cubist nightmare.

Madeline and the girls play matchmaker and are invited to be in the resulting wedding. However, Madeline's feelings are hurt when Pepito starts ignoring her, not knowing that he's being ruthlessly teased by his cousin Pablito for "liking a girl". When she learns the truth, she convinces them it's okay for them to be just friends.