Misc: Who starred with Fred Astaire in the Christmas movie "Holiday Inn"?

Questions

The plant Lunaria Annua is grown mainly for its seed cases and used in flower arranging by what name is it more commonly known?

Who was the Chief Designer of the AVRO Lancaster bomber aircraft?

For which team will Jensen Button be driving in the forthcoming Formula 1 World Championship motor racing season?

Galena is the principal Lead ore which other element is combined with the metal to form Galena?

Who wrote the children's novel The Secret Garden?