If some of the international celebrities were called by their real names in award ceremonies, or even on television shows, fans would be confused; especially if they never knew that what these artists were using were mere pseudonyms. Here are some of them. Katy Perry The “Dark Horse” singer was born Katheryn Elizabeth Hudson — she used her mother’s maiden name to avoid confusion with actress Kate Hudson. Michael Keaton The Birdman actor could have shared a name with another famous actor — he was born Michael Douglas. Natalie Portman They called for Natalie Portman when she accepted the Best Actress Oscar for Black Swan, but her birth name is actually Natalie Hershlag. Miley Cyrus Cyrus’ birth name actually sounds like more of a stage name than Miley does. Her parents named her Destiny Hope Cyrus, but her nickname “Smiley Miley” caught on, so much so that she legally changed [...]