Phineas and Ferb - Fireside Girls Disappear
In the episode of Phineas and Ferb when they look for Bad Beard's treasure, Phineas, Ferb, Isabella, Baljeet, and Buford go on their boat. Then they sing a song, and all of a sudden, the Fireside Girls are there. When they leave the boat to go in the cave, once again it's only Phineas, Ferb, Isabella, Baljeet, and Buford. The Fireside girls have disappeared.