The Suite Life on Deck Season 3 Episode 21

After the students pull a prank on Mr. Moseby, he cancels the senior prom. So, Zack comes up with a plan to have a “secret prom”. Meanwhile, Bailey tries to get everybody to vote her for prom queen while Cody helps Woody ask Addison to prom. Ultimately, the kids award the roles of king and queen to Mr. Moseby and Ms. Tutweiller.