(Spoiler alert: Do not read on if you haven’t watched “Happiest Season.”)Despite starring in one of the most popular heterosexual relationships on screen (“Twilight”), openly bisexual actor Kristen Stewart said she felt the need to be a part of the first LGBTQ Christmas rom-com movie released by a major studio, called “Happiest Season.”“Not only is it very, very funny, [but] it feels really lived-in and reflective of something really familiar to me and a lot of people that has not been evident in really big commercial rom-com type movies,” Stewart told TheWrap. “The movie really broadcast how everyone’s coming-out story is totally theirs and individual, and there are so many different versions of that story.