Music Term: (It.) - The chief castrato or tenor role, used in the 18th century.?

Questions

Which group's first single didn't even scrape the bottom of the top 40, but their second, '867 5309/Jenny' peaked & went gold in 1982?

which groups third album was 'sports' & featured 'heart & soul' & 'i want a new drug'?

Which kylie minogue song sings "i'll forgive & forget if you say you'll never know"?

which mccartney song is about john lennons' son & his trauma after lennon's divorce?

which member of a band plays the 'skins'?