I sing in the shower, do you?
Bathroom singing
Bathroom singing, also known as singing in the bathroom, singing in the bath, or singing in the shower, is a widespread phenomenon. 
Many people sing in the bathroom because the hard wall surfaces, often tiles or wooden panels, and lack of soft furnishings, create an aurally pleasing acoustic environment. The multiple reflections from walls enrich the sound of one's voice. Small dimensions and hard surfaces of a typical bathroom produce various kinds of standing waves, reverberation and echoes, giving the voice "fullness
Now I Can Dance (book)
Now I Can Dance is an autobiography by Australian singer-songwriter Tina Arena. Arena says, "I don't know what I would do if I couldn't write and sing. It makes me who I am, regardless of where I happen to be or what language I'm speaking. It has done since I wrote my first song and sang it to myself in the shower. It's as natural for me as breathing."
The tile of her memoir, Now