See the full post for links that will entertain you.
While there might be 1,000,000 reasons not to learn to play the ukulele surely this video by the Ukulele Orchestra of Great Britain provides one of the strongest reasons FOR learning to play. (That's also primo whistling!)
Just as fun "Life on Mars" played by the Ukulele Orchestra of Great Britain manages to work in "My Way," "Once in My Life," and a couple other tunes.
And if you are in the listening mode check out the Ukulele Orchestra of Great Britain's rendition of "Misirlu" (known to many from the film "Pulp Fiction").
For information on the group, or to purchase recordings, go to the Ukulele Orchestra of Great Britain's web site.