Fergie - the then Duchess of York on an Emery DC8 from STN.
My job was to show her around the AC and introduce her to the crew. The main deck was full of relief supplies.
Once I'd given her a quick tour - we got back on the ramp to meet some local dignitaries and the airport managers.
Discretely she then asked me 'What do I do if I need the bathroom?'
The thoughtful crew hastily erected a little curtain to protect her modesty in said on board facility.