one of my favorite things to sing is "Honey Pie" by the Beatles. What do you like to sing in the shower?
Excellent acoustics. And I don't sing in the shower anymore, but when I used to, it was "Don't Know Why" by Norah Jones because if I can belt any song, it's that one.
Its mostly improvisations ranging from opera epics and lowkey folk to series of screeches and drones. I take singing in the shower very seriously, its an art.
Someday, we will shower in adjacent, non-communal, blocked off cubicles and we will sing a duet of "Time" together.
my water heater is absurdly small so i barely have time to wash myself in the shower, let alone sing.
I also like to sing Frank Sinatra's Fly Me To The Moon. I prefer baths to showers though... and the acoustics aren't as good there, unfortunately.