The Swifties are shook! Earlier this week, Saturday Night Live announced Taylor Swift’s ex-boyfriend Jake Gyllenhaal and her friend Sabrina Carpenter will both star on the May 18 season finale. While some fans thought it was in bad taste for the Disney Channel alum, 24, to be on the same episode as Gyllenhaal, most found it to be a hilarious coincidence. “If there is not a sketch on ‘All Too Well,’ it’s gonna be a riot,” one person wrote on social media, referring to the tune Swift, 34, is rumored to have wrote about her breakup from the actor, 43. “Wow. SNL chose violence on May 18,” another …