In "My Sweet Ride", Phineas refers to this show as they are dressed in the 1950s, "like when everyone dressed as a sitcom from the '70s". Also, Ferb is dressed like Fonzie, while Phineas says "Heeyyyyy..."
The song in "My Sweet Ride" is based on songs from "Grease", and Ferb and Major Monogram are dressed like Danny Zuko while Phineas and Jeremy act similar to him, and Candace looks and acts like Sandy Olsson