John Fred Gourrier (May 8, 1941 – April 15, 2005) was an American blue-eyed soul, swamp pop, rock and roll, and R&B performer from Baton Rouge, Louisiana, best known for the 1967 No.

He appeared on Alan Freed's show, but when Dick Clark asked him to sing on American Bandstand, Fred had to turn him down because he had to play in a basketball game.

Only after years of struggles did Fred obtain full legal rights to "Judy in Disguise" and its royalties.

[10] Fred continued to perform in bands, coached high school basketball and baseball, and remained a fixture at concerts and shows in his hometown.

He produced records for other artists, including Irma Thomas and Fats Domino, and hosted a popular local radio show, The Roots of Rock 'n' Roll, at WBRH in Baton Rouge.