Katy Perry is apparently taking herself off the proverbial dating market, and she doesn't seem unhappy about it. "This guy is trying to get me to marry him and he has a ring in his hand," Perry told the crowd during her Thursday, October 30, concert in Prague, the capital city of the Czech Republic. "No! I am dating someone else for crying out f***ing loud." The comments came after Perry noticed a fan holding a sign that included a marriage proposal. She previously turned down a fan's proposal in London on October 13.