Queen - Bohemian Rhapsody tis always a good one...providing you can still stand before the mad ending!
and another song i just love to sing along to with my extremely drunk chumz is Iron Maiden - Run To The Hills...but has to be sung with a true an mighty bruce d!ckinson voice!!!
or even still The Police - Message In A Bottle...and not before long you mumble the lyrics and find the only words you know are 'message in a bottle'