Billy Crystal remembered his best friend, Rob Reiner, in an extended and emotional in memoriam at the Oscars on Sunday, and legend Barbra Streisand honoured her friend and co-star Robert Redford by singing a snippet from their film The Way We Were. Canadian actor Rachel McAdams paid tribute to "fellow Canadian" Catherine O'Hara and her The Family Stone co-star Diane Keaton in a heartfelt speech.