Katy Perry is her stage name. Katheryn Elizabeth Hudson is her birth name, but in her early career she sung Gospel Music as Katy Hudson. But apparently that was too close to actress Kate Hudson, so she changed her surname to Perry, which is her mother's maiden name, so I guess she did legally change her name.
Well, it depends on what Taylor you are referring to. The only way a human can get a new last name I believe is if they legally change it (though I'm not sure you can do that) or if they are a female, and they get married and they choose to. They may choose to keep their maiden name or their husband's last name. However, anybody can change their name on a website such as facebook, twitter, etc. Changing your name on those websites does not legally change it, however it changes what people can search you as on that website.
Taylor swift whole name is Taylor Allison Swift.
Taylor Swift's name is Taylor Allison Swift.
Her real name was Katheryn Elizabeth Swift but she change her name to Taylor Alison Swift because she wanted to be a singer Taylor Swift's real name is Katheryn Elizabeth Swift she change her name into Taylor Alison Swift then her mother and father realize that the name that Taylor is thinking is great and her mother and father wanted Taylor Swift to be a singer then Taylor Swift said yes she wrote her songs when she was 13 to 18.]her birth name is Taylor Alsion Swift though.
i guess...
Taylor Swift's middle name is Alison and by the way, she is my favorite singer!
Taylor swift whole name is Taylor Allison Swift.
Taylor Swift's name is Taylor Allison Swift.
Her real name was Katheryn Elizabeth Swift but she change her name to Taylor Alison Swift because she wanted to be a singer Taylor Swift's real name is Katheryn Elizabeth Swift she change her name into Taylor Alison Swift then her mother and father realize that the name that Taylor is thinking is great and her mother and father wanted Taylor Swift to be a singer then Taylor Swift said yes she wrote her songs when she was 13 to 18.]her birth name is Taylor Alsion Swift though.
Taylor Swift's full name is Taylor Alison Swift.
Taylor Swift's birth name is Taylor Alison Swift.
Taylor Swift's full name is Taylor Alison Swift.
Taylor Swift's screen name for movies is Taylor Swift.
i guess...
Her stage name is Taylor Swift, but her real birth name is: Taylor Allison Swift
Taylor Swift's middle name is Alison and by the way, she is my favorite singer!
Taylor Swift's birth name was Taylor Alison Swift.
Taylor Swift's moms name is Andrea Swift.