Misc: what group performed such songs as 'i swear' and 'i can love you like that'?

Questions

What was Attila the Hun doing when he died?

This Pope was murdered by an irate hubby who found him on top of his wife?

How many umbrellas are lost on the London Underground each year?

Until the introduction of the Julian Calender in 1752, New Year's Day fell on which date?

Which country is the only one which doesnt print its name on its postage stamps?