I found this video and I thought you could have a lot of fun with it. Its a video made by "cdza". For some reason they decided to do a melody of songs over the last 100 years or so that included whistling.

The thing I love most about it is they don't actually tell what the songs are but they do give you the artists, so you can totally make a game out of it and see how many songs you can name as you listen. You can try it first not watching and name them without the artists names, then again with that hint. I'm not gonna lie to ya, I did pretty good. I think I counted 23 different songs and I was able to name 12 on the first listen. I was not very good at the newer songs at all.

Give it a try, and let me know how you did, in the comments section at the bottom of this page.