For reference, the first scandal they're talking about is Shinsuke Shimada's retirement from entertainment (https://en.wikipedia.org/wiki/Shinsuke_Shimada). The quiz program was Quiz Hexagon II (https://en.wikipedia.org/wiki/Quiz!_Hexagon_II) and the group that formed and released a hit single, eventually appearing on Kohaku Utagassen, was Shuchishin (https://en.wikipedia.org/wiki/Shuchishin).
Not sure which actress they are talking about in the suicide section, but depending on when it was recorded, it may have been Sayaka Kanda (https://en.wikipedia.org/wiki/Sayaka_Kanda).