SV,
It was a 3 hour special. I saw it on Time Warner's "On Demand" and it was in two parts for some reason. Part 1 was 35 (or so min.) and part II was about 1 or so. I KNOW that the Blues Brothers performed (Jim Belushi/Dan Ackroyd) and I know the Jimmy Fallon/Justin Timberlake did a rap number, however that was not part of the special from On Demand. So, I'm not sure what they're doing.

Even eliminated commercials it was short I think
TIS