Oscar Makes an Impression

"Oscar Makes an Impression" is an episode of Fish Hooks.

Summary
Oscar's impression of the Queen of Fish England is so similar that even Mr. Mussels (who is a big admirer of the Queen) can't tell the difference between her and Oscar. The gang goes along with the ruse, until Oscar is mistaken for the Queen by a bridal party and swept away to "his" royal wedding. Then the day escalates into a "Slow Jams Rap Battle" between Milo and Mr. Mussels to win the hand of the fair Oscar.