music: 70's Chart Toppers: Name The Artist: Walking In Rhythm?

Questions

Which superhero has been portrayed on screen by Michael Keaton, Val Kilmer and George Clooney?

With which Motown group was Diana Ross a singer in the 1960's?

What is the longest river in Italy?

What kind of animal is "Nipper", the famous HMV logo?

What was the name of the banqueting hall gutted by a fire at Windsor Castle in 1992?