Welcome to the online aspect to the Top 5 Countdown. Admittedly, far less interesting than the on-air 
segment; I must also say it is nonetheless as informative...if the data is what you're after. The basic idea for the topic of whistle songs is perhaps a tribute to one of its most modern practitioners--Andrew Bird, who is coming to town for two nights this Friday and Saturday. And with the success of songs here from artists like Peter Bjorn & John and Mocky, we figured you all'd be game on it too. And I was right, lots of feedback. Many of your picks made the list, here is what Scott and I came up with...
#5
Ennio Morricone "The Good The Bad and The Ugly Theme"
#4
Peter Bjorn & John "Young Folks"
#3
J. Geils Band "Centerfold"
#2
Edward Sharpe "Home"
#1
Andy Griffith "The Fishing Hole Song"