James Morrison - who it appears is still going - seems to be somewhat put out that Madonna didn't have a clue who he was:
"I'm not her biggest fan but thought I'd say hello so I went over and said: 'Hello, I'm James, nice to meet you,' and put my hand out to shake hands.
"She just looked at it and said: 'And what do you do?' I told her I was a singer and she just stared at me and didn't say anything. It was really uncomfortable. Then she just ignored me.
"Fuck her, though, it's just a matter of common courtesy. It doesn't matter what someone does for a living. She's just rude. There's no excuse for it."
It's not entirely clear what James was expecting her to do - nor, indeed, why he didn't have the wit to break the awkward silence by saying "it's alright - I'm not James Blunt or anything." Or perhaps "... and you? What is it you do?" I have no doubt that Madonna is so incredibly haughty that she would view conversation with an underling as a waste of her valuable time, but it does take two to make an awkward silence.