谁知道《功夫熊猫》的主题曲《kong fu fighting》是原创的还是另有出处？

《Kung Fu Fighting》是美国歌手Carl Douglas(卡尔-道格拉斯)的代表作品。
《Kung Fu Fighting》创作于上世纪70年代，是国外著名的中国功夫(KUNG FU)类歌曲。2004年周星驰电影《功夫》就使用了该歌曲作为电影音乐。2008年梦工厂（DREAMWORKS）动画CG大片《KUNG FU PANDA》也将《KUNG FU FIGHTING》作为电影主题曲，充分体现了该歌曲的生命力。

歌词
版本一：最原始的
Kung Fu Fighting 歌词：歌手：Carl Douglas
Oh-oh-oh-oh...
Oh-oh-oh-oh...
Oh-oh-oh-oh...
Oh-oh-oh-oh...
Everybody was Kung Fu fighting
Those jerks were fast as lightning
In fact it was a little bit frightening
But they fought with expert timing
There were funky China men
From funky Chinatown
They were trapping when up
They were trapping when down
It's an ancient Chinese art
And everybody knew their part
For my friend, ain't you a stiff
Then I'm kickin' from the hip
Everybody was Kung Fu fighting
Those kids were fast as lightning
In fact it was a little bit frightening
But they fought with expert timing
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