Eyebrows rise at the thought of Renée Fleming, a soprano who has built her reputation on the creamy beauty she brings to lyric soprano roles created by Mozart, Strauss, and others, singing the wrenching verismo repertoire of Puccini, Mascagni, Catalani, Cilea, and others. Verismo is about blood and guts, sweat and suffering, and enough over-the-top singing to sear the makeup off Fleming’s ubiquitous glamour shots.