Misc: who did a version of 'one bourbon, one scotch, one beer' on his 1977 debut album?

Questions

"Summer of 69" was a hit for this Canuck in the Summer of 1984?

As pleased as _________?

What magazine did Harry Truman sell his memoirs to on February 21, 1953?

What former South African prisoner had an 11-day, 8-city tour of the U.S. in 1990?

The giant panda is native to what continent?