I'm going to Disney World!

"I'm going to Disney World!" and "I'm going to Disneyland!" are advertising slogans used in a series of television commercials by The Walt Disney Company that began airing in 1987. Used to promote the company's theme park resorts in Florida and California, the commercials most often are broadcast following the Super Bowl and typically feature an NFL player (usually the Super Bowl MVP) shouting the phrase while celebrating the team's victory immediately after the championship game. These commercials have also promoted champions from other sports, and winners of non-sport competitions such as American Idol.

Disney refers to the campaign as "What's Next?" in reference to the commercial's usual format, which has the star appear to be answering a question posed by an unseen narrator—"What are you going to do next?"—after his or her moment of triumph. The narrator is Mark Champion, a veteran radio play-by-play announcer for the Tampa Bay Buccaneers, Detroit Lions, Detroit Pistons, and Westwood One. Most ads feature the song "When You Wish upon a Star" (which is currently sung by Idina Menzel) and end with a shot of fireworks over Cinderella Castle or Sleeping Beauty Castle.

Typically the star records two versions of the commercial—one for each phrase—so that the ads can be broadcast in different American media markets to strategically promote either the Walt Disney World Resort in Florida or the Disneyland Resort in California. In most cases, Disney arranges for its star to appear in a parade at either Disneyland or one of the Walt Disney World theme parks the day immediately following the victory in order to fulfill the spoken promise in one version.

...
Wikipedia