John The Whistler is Umberto Carli, a Bubblegum Macho artist from Denmark. He is most well-known for his 2000 single "I'm In Love" which appeared on his debut album, It's Crazy (2001). John The Whistler is produced under the Edel Records label (Germany & Denmark). His song "I'm In Love" has also appeared on a number of dance compilation albums, including Absolute Hits 2000 and Absolute Kids 2.

Like Holly Dolly, Crazy Frog, and Gummibear, a computer-generated character appears in the music videos singing along to the songs. In John The Whistler's case, the character is an anthropomorphic animal with a large nose and big ears, dressed in human clothing.

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