|Jimmy Buffett must have approved.|
No, not for today's Airman, but at one time it seems the attire adorning the lady was actually in use. I found the picture and this...
"Washington (AP) The Air Force unveiled its new Battle Dress Uniform today. The utilitarian thing about the new uniform said Air Force representatives was that it has a built-in reversible Hawaiian shirt.
"This helps keep troops at the ready," said one Air Force Official. "If they are off duty they simply turn the shirt inside-out and come into work."
...on a Military News site. As near as I can tell, the uniform (without the shirt) was in use for about 3 years.