Is Lady Gaga an only child?
No, I believe that Lady Gaga has 1 sister.
Lady Gaga is her stage name taken from the Queen song "Radio Gaga". Lady gaga changed her name, because lady gaga is her stage name. When she was little she liked being a lady, and then gaga was another word for crazy. So that is how she got her name. because she is a weird child and felt like it :)