love Jamie Dornan. While celebrating the premiere of his new film "Belfast," the actor got on stage at a post show party to serenade the crowd with his rendition of "Everlasting Love," a song made most famous by English band Love Affair in 1968.A post shared by Belfast (@belfastmovie)The "Belfast" official site posted video of the impromptu performance, writing, "Jamie Dornan serenades the crowd at last night's #BELFAST premiere with his irresistible rendition of Everlasting Love." In "Belfast,"