Two. One to change it and one to yell "Ta-daa!" when he's done.
Just one to hold it in place while the rest of Europe runs circles around it.
One...but it takes him 27 tries
One, AND IT'S NOT FUNNY!
None. The change, if needed, will come from within.
A! U!!! If it doesn't make sense tell it so someone out loud. Pretty sure this is my first original joke :)
Phillip