Billy Crystal, Rachel McAdams, and Barbra Streisand led emotional tributes to late icons Rob Reiner, Diane Keaton, and Robert Redford at the 98th Academy Awards.McAdams honored Keaton, who died from pneumonia at age 79, by reflecting on her legacy as a multifaceted actress and artist during the In Memoriam segment.Streisand and Crystal shared memories of their collaborations with Redford and Reiner, concluding with an emotional performance of The Way We Were.