From 2000 to 2001, but not yet in 2009 and nowhere near my exam revision, I can't tell if this is hilarious or devastating. 

Hilarious: Michael Jackson's godlike acknowledgement at the beginning.

Devastating: The sense that Liza's not quite with us, savouring a comeback moment that's not quite happening.

Hilarious: The final high note.

Devastating: When she flashes some leg.

Hilarious: When the gospel choir emerges in the background.

Devastating: A pervasive feeling of tragedy and decline.