Pat Saperstein Deputy Editor John Travolta introduced the Oscars In Memoriam segment, tearing up while remembering his “Grease” co-star Olivia Newton-John. “They’ve made us smile, and became dear friends who we will always remain hopelessly devoted to,” a visibly emotional Travolta said before the video montage began. The Oscars recognized the actors and filmmakers we lost over the past year in the annual In Memoriam segment, which this year unfurled to the sound of Lenny Kravitz playing “Calling All Angels.” The emotional segment is a viewer favorite, but omissions of high-profile Hollywood figures spark annual debate.