Misc: what was built on the site of the old waldorf astoria hotel in new york?

Questions

For what popular singer did David play keyboards at a campus function?

Jamie Walters (Ray Pruitt) also starred on what short-lived Fox series?

This SUPER-hunk played Brenda's love interest in France.?

What was the name of the guidance counselor at West Beverly?

Which character had an unrequited crush on Brandon through most of high school?