this is a little late.. but anyhow..
funny you should mention that, becasue they day i saw this post the first time, that girl was a guets on Leno, and she came and sang happy bday to him on TV... and they played the clip again also (of her falling)
I seen that too on Jay Leno one day last week. I think he said she forgot the words and went to go figure out what the words were suppose to be. You talk about embarrassing. I think I would have just rather died!! 2 slip ups in 2 minutes. Cant get any worse than that.