My favorite depiction of the Star Fairy comes from a 1984 French movie, J'ai rencontré le Père Noël. I was at the local premiere with my parents, I was given the soundtrack and I still have it (it is a vinyl 45 rpm). It is not a great movie by far, but to me, it is associated with Christmas and I love to watch it and listen to the music.
In the movie, the Fairy is played by French Singer Karen Chéryl. Her dress looks nothing like the usual descrition: she wears a cream coloured Elizabethan inspired dress, complete with puffed and slashed upper sleeves and sheer fan collar.
In the following video (a clip from the TV show Champs-Elisées (1982) that originally aired on November 24, 1984), starting at around 2:20 minutes, you can see Karen Chéryl in her Fairy dress, full length and in detail.