"Gaga and Stefani are my nicknames. I guess when people meet me for the first time and call me Stefani, it bothers me. Because it's something that's reserved for only the people who are closest to me. It's not because I don't like my given name; it's that I became somebody else. I became somebody else for a reason, you know. This is part of what my message is - you can become whoever you want to be, to escape your past."

Source: Source: www.glamour.com