It depends on what's stuck in my head. Yesterday I was singing nothing but "Brand New Day" from Dr. Horrible. Before that it was "Fish heads, fish heads, roly poly fish heads. Fish heads, fish heads, eat them up, yum!"
I have a tendency to sing to myself in public too.
I sing a lot by myself, Ken...folks won't stay around. I sing "Folsom Prison Blues" (J. Cash), "Oh The Water" (Van Morrison), "Hello In There" (John Prine), "To Make You Feel My Love" (Bob Dylan), "Against The Wind" (Bob Seger), and just a lot more by people in the "Americana" genre. Thanks. WB