I love singing in the shower! It's widespread, a lot of people do it.
Haha I admit I do it sometimes too. I like the acoustics, What kinda songs do you sing in the shower lol?
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
she hasn't given much thought to the controversy over questionable lyrics:
"The songs that I sing don't fall into that category, so I don't think about it at all. But I believe that music does influence people. It's a universal thing. Everybody listens to music and knows about it. I think that the lyrics can have a lot to do with influencing whoever you're singing to. I think that as far as children are concerned, parents should have control over what they listen to.