Acronym Soup: GA?

Questions

according to rod stewart he knows secrets about someone in high society. who is it?

who was born michael bolotin?

steve miller released a song about this, which he hoped wouldn't carry him too far away?

although he starred in many gangster films, who started his career as a chorus girl?

while experimenting with speeding up a tape, david seville created three voice characters and released a christmas song in 1958. which nutty group was this?