from
Anthony Perkins.
also known for his hit song 'moonlight swim' of 1957, when it reached #24 on the Billboard Hot 100, under the name 'Tony Perkins'. The song was later recorded by Elvis and included on the Blue Hawaii soundtrack.
Now with the knowledge of Anthony Perkins' musical prowess, I feel a Norman Bates breaking into song in some not so crucial scene would have worked rather well.