Scott Walker Recall Song, 'Hit The Road Scott,' Sung By Rep. Gwen Moore (VIDEO)

On Saturday, the four Wisconsin Democrats vying for the party's gubernatorial nomination spoke at the Wisconsin Democratic Party's Founders Day dinner at the Milwaukee Athletic Club, stressing the need for unity to defeat Gov. Scott Walker (R) in the June recall election.

But perhaps the highlight was Rep. Gwen Moore (D-Wis.) unexpectedly bursting into song.

Moore had audience members singing and clapping to her song, "Hit the Road Scott," which she sang to the tune of "Hit the Road Jack." The other officials on stage joined in, singing, dancing and humming. The spunky performance, which rattled off a list of Walker's evils, lasted about six minutes.

Milwaukee Mayor Tom Barrett, former Dane County executive Kathleen Falk, Wisconsin Secretary of State Doug LaFollette and state Sen. Kathleen Vinehout (D-Alma) are running for the Democratic gubernatorial nomination. The primary election is on May 8 and the general election will be held June 5.

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Below, the history behind the Walker recall effort: