It's Flashbeagle, Charlie Brown is the 27th prime-time animated musical television special based upon the comic strip Peanuts by Charles M. Schulz.

[1] The special is presented as an original musical which features parodies of the early-1980s breakdancing craze, MTV, the films Saturday Night Fever, Flashdance, and Footloose, and a number of popular top 40 hit songs of the early 1980s.

Later that day, Snoopy decides on an outfit for a night on the town and heads to a discothèque with Franklin, where his dance moves are met with acclaim from the other club-goers ("Flashbeagle (1st Reprise)").

He changes all of that by turning on his boom box, causing Snoopy to awaken and dance, and the children gradually join in ("Flashbeagle (2nd Reprise)").

Bill Melendez explained that the dancing Snoopy in the club scene was done by rotoscoping where the character is drawn over live-action pictures.

The special's cast would go on to provide the voices on the second season of The Charlie Brown and Snoopy Show, save for Gary Golen, who would be replaced by Danny Colby.