I'm not a great lover of whistling in songs, apart from a few exceptions like Otis Reading's Dock of the bay, for instance.
Another exception, (I think) is Kacey Musgraves 'High Time' which just seems soooo right for that song.
What's your favorite song with whistling ?
Over my Shoulder by Mike and the Mechanics, Wind of Change by Scorpions, Joyride by Roxette. I did a whole round of them once at the Quiz, about 20 I think. Quite interesting researching them.