music: 80's Chart Toppers: Name The Artist: In America?

Questions

Her name, repeated twice, was the title of a 1970's TV show?

Fishy character who hosted NBC's Scrabble and Scattegories game shows.?

Game where "if you hear this sound twice (bz bz) you've given a duplicate answer?

Host of Caesar's Challenge?

Host of the Family Feud after Richard Dawson?