1970s Hits: This co-star of "The Carol Burnett Show" hit #1 in 1973...?

Questions

There is a village near the Somme in ______ which is simply called Y?

In the north of _______, the sun shines constantly for about 14 weeks each summer?

The Polynesian country of _______ is a 170 square kilometre limestone rock emerging 60 metres from the Pacific?

Yugoslavia is bordered by _____ other countries?

Within a few years of Columbus' discovery of America, the ______ had killed one and a half million Indians?