John Travolta gets emotional at the 95th Academy Awards. The actor made a special appearance to introduce the In Memoriam segment, which featured a performance from Lenny Kravitz. John's introduction paid special tribute to his 'Grease' costar, Olivia NewtonJohn, who died last August after battling cancer. John couldn't hold back his tears as he said, 'They've touched our hearts, they made us smile and became dear friends who we will always remain hopelessly devoted to.' Olivia, of course, sang 'Hopelessly Devoted to You' in their 1978 musical film.