the Call Me By Your Name soundtrack is so small and delicate (not as small and delicate as "Visions of Gideon" is, but still nowhere near as grandiose as he can get) that I did think that if he was going to perform it at the Oscars than it might just end up being him and his little banjo or whatever, plinking away in butterfly wings. But NOPE. He's bringing half of Indie Music with him, actually!
"Last month, it was announced that Sufjan Stevens would be performing his Oscar-nominated song “Mystery of Love” at this year’s Academy Awards ceremony. Now, it’s been revealed that he’ll be flanked by some special guests on stage: St. Vincent, Moses Sumney, Chris Thile (of Punch Brothers and “Live From Here”) will join him. Frequent Sufjan collaborators Casey Foubert and James McAlister will perform as well."
Back when St. Vincent was just "Annie Clark" she was one the folks that played on stage with him when he toured; I saw her that way a ton back in the early Aughts...