I love singing especially Bathroom singing
Aparently it is becoming a widespread phenomenon so you are certainly not alone!
So what type of singing is that classified as?
now thats a question! im not sure but it seems that the multiple surfaces especially types enriches the sound of your voice.
How does it work as explained?
Well the different surfaces of a bathroom produce various kinds of sound waves and echoes giving the singers voice fullness and depth.
Sure! I love that vibration when I listen to myself enclosed in those walls
It seems even famous singers do it too.  Paul Simon wrote his son 'Weird Al' back in 1979 in the bathroom of the building he was djing at!
Wow! There's such an inspiration when you sing in the bathroom
I know.  Also Bjork recorded her song 'Theres more to life than this' in the bathroom of a London nightclub. So there you go, you are just like a famous singer!