I like singing in the shower! Haha, have you participated in the widespread phenomenon?
I haven although I'm terrible at singing
Right, I'm not good either haha. The hard walls in the bathroom provide an aurally pleasing acoustic environment though!
Yeah, it does make the sound more enjoyable
and depth."
This habit was reported (with an attempt of explanations) centuries ago. For example, Ibn Khaldun in Chapter 1 of his "Muqaddimah" writes:
The bathroom singer is an ironic reference to mediocre or amateur singers.
Jon Anderson had tiles installed in the studio, to simulate the echo effect of one's vocals in a bathroom.
This effect was not used only by singers. Paul Simon wrote:
"Weird Al" Yankovic in fact in 1979 recorded his first single,
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