How many "famous" people on yahoo answers are really the famous people the claim to be?

So, I asked a question that I said I dislike the music of Katy Perry, Justin Bieber and Lady Gaga, As well as most modern artists, I got an answer from "Katy Perry" where she claimed she was better than Elton John (Favorite artist), Frank Sinatra (Close second), Sammy Davis Jr., Dean Martin, Elvis, the Beatles, Aerosmith, Ozzy Osbourne, Black Sabbath, Foo Fighters, 3 doors down, Three Days Grace, Creed, Led Zepplin, Rammstein, KISS, Billy Joel, Bon Jovi, Alphaville, the Rolling Stones, Jethro Tull and Lynyrd Skynyrd, Now as any reasonable person with major trust issues would do I automatically called Bull, what are the chances of it being the real Katy Perry, also this is partially an attempt to call her out if it is really her, because she doesn't allow messages, Does anyone think this was the really Katy Perry because I sure as hell don't.