Bodog lets you bet on how long it will take Billy Joel to sing the national anthem before the Super Bowl ("Super Bowl Team Props"). The current line is Over 1:44 +100 Under 1:44 -140. Billy Joel has sung the national anthem at a major sporting event before. You can watch it here:
http://www.youtube.com/watch?v=C7qnMitnDSY
In which he takes 1:38. Now, I'm not a musician, but it's hard to imagine how he's going to stretch that out for another 6 seconds. Fair value for the Under is more like -200 or more.