Keith, here is the earliest version I am aware of the joke you passed off as your own after roasting Corden for stealing jokes.
I have heard this joke subsequently used about a half dozen times since origin until you just passed it off as your own.
https://www.youtube.com/watch?v=8c566A6UuFE
Just doing this is not that big of a deal but right after having a go at others for doing it is just a highlight of your contradictory views. Okay if it benefits you and horrible if anyone else does it.