Photo Credit: Getty Images Did you Machine Gun Kelly's SNL performance over the weekend? Kelly starred as the musical guest for the show and his rumored Fiancé, Megan Fox, was also in attendance and the couple showed MAJOR PDA! Kelly described his performance as "one of the best moments of his life!" and took to twitter to share his gratitude! Fox also took to social media to support her man! Watch him perform his song "My Ex Bestfreind"