Tribute to Marni Nixon - What do the following clips and people have in common?

Tribute to Marni Nixon - What do the following clips and people have in common?*

Margaret O'Brien
Deborah Kerr
Natalie Wood
Audrey Hepburn
Marnie Nixon

The Secret Garden (1949)
The King And I, "Getting to Know You" (1956)
West Side Story, "I Feel Pretty", "Tonight" (1957)
The Sound of Music, "Maria" (1965)

*Note: All clips for this sequence were taken from YouTube videos.

Видео Tribute to Marni Nixon - What do the following clips and people have in common? канала Daniel Schenk