Singer Lady Gaga and reality TV personality Caitlyn Jenner are among 49 celebrities who participated in a tribute video dedicated to the Orlando massacre victims.The 18-minute video produced by Ryan Murphy shows photographs of the 49 victims who were gunned down less than three weeks ago at the Orlando nightclub, Pulse, reports variety.com.A different celebrity narrates each picture by describing the victim’s life.The project was filmed at Fox Studios here over three days.“The hate that stole these 49 individuals from all those who loved them has been allowed to flourish in our country for too long,” Murphy said in a statement.“No person is born hating another, and we have an obligation as Americans to stand up against prejudice and bigotry that would incite violence against someone simply for who they are,” he added.Some of the other participants to feature in the video are Demi Lovato, Gerard Butler, Jane Fonda, Jamie Lee Curtis and Emma Roberts.