Second thought: the only musical cross-breeding I find more amazing is the Gilligan's Island theme and "House of the Rising Sun" by the Animals. Here, try it:
There is a house in New Orleans
They call the Rising Sun
And it's been the ruin of many a poor boy
And God I know I'm one
My mother was a tailor
She sewed my new bluejeans
My father was a gamblin' man
Down in New Orleans
Now the only thing a gambler needs
Is a suitcase and trunk
And the only time he's satisfied
Is when he's on a drunk
<Animals organ solo / Gilligan character intros>
Oh mother tell your children
Not to do what I have done
Spend your lives in sin and misery
In the House of the Rising Sun
Well, I got one foot on the platform
The other foot on the train
I'm goin' back to New Orleans
To wear that ball and chain
Well, there is a house in New Orleans
They call the Rising Sun
And it's been the ruin of many a poor boy
And God I know I'm one
